Aaru/SCSI/EVPD.cs

// /***************************************************************************
// Aaru Data Preservation Suite
// ----------------------------------------------------------------------------
//
// Filename       : EVPD.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : Device structures decoders.
//
// --[ Description ] ----------------------------------------------------------
//
//     Decodes SCSI EVPDs.
//
// --[ License ] --------------------------------------------------------------
//
//     This library is free software; you can redistribute it and/or modify
//     it under the terms of the GNU Lesser General Public License as
//     published by the Free Software Foundation; either version 2.1 of the
//     License, or (at your option) any later version.
//
//     This library is distributed in the hope that it will be useful, but
//     WITHOUT ANY WARRANTY; without even the implied warranty of
//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
//     Lesser General Public License for more details.
//
//     You should have received a copy of the GNU Lesser General Public
//     License along with this library; if not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2011-2020 Natalia Portillo
// ****************************************************************************/

using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using Aaru.CommonTypes.Structs.Devices.ATA;
using Aaru.CommonTypes.Structs.Devices.SCSI;

namespace Aaru.Decoders.SCSI
{
    [SuppressMessage("ReSharper", "InconsistentNaming"), SuppressMessage("ReSharper", "MemberCanBeInternal"),
     SuppressMessage("ReSharper", "MemberCanBePrivate.Global"), SuppressMessage("ReSharper", "NotAccessedField.Global"),
     SuppressMessage("ReSharper", "UnassignedField.Global")]
    public static class EVPD
    {
        /// <summary>Decodes VPD page 0x00: Supported VPD pages</summary>
        /// <returns>A byte array containing all supported VPD pages.</returns>
        /// <param name="page">Page 0x00.</param>
        public static byte[] DecodePage00(byte[] page)
        {
            if(page?[1] != 0)
                return null;

            if(page.Length != page[3] + 4)
                return null;

            byte[] decoded = new byte[page.Length - 4];

            Array.Copy(page, 4, decoded, 0, page.Length - 4);

            return decoded;
        }

        /// <summary>Decides VPD pages 0x01 to 0x7F: ASCII Information</summary>
        /// <returns>An ASCII string with the contents of the page.</returns>
        /// <param name="page">Page 0x01-0x7F.</param>
        public static string DecodeASCIIPage(byte[] page)
        {
            if(page == null)
                return null;

            if(page[1] == 0 ||
               page[1] > 0x7F)
                return null;

            if(page.Length != page[3] + 4)
                return null;

            byte[] ascii = new byte[page[4]];

            Array.Copy(page, 5, ascii, 0, page[4]);

            return StringHandlers.CToString(ascii);
        }

        /// <summary>Decodes VPD page 0x80: Unit Serial Number</summary>
        /// <returns>The unit serial number.</returns>
        /// <param name="page">Page 0x80.</param>
        public static string DecodePage80(byte[] page)
        {
            if(page?[1] != 0x80)
                return null;

            if(page.Length != page[3] + 4)
                return null;

            byte[] ascii = new byte[page.Length - 4];

            Array.Copy(page, 4, ascii, 0, page.Length - 4);

            return StringHandlers.CToString(ascii);
        }

        /// <summary>Decodes VPD page 0x82: ASCII implemented operating definition</summary>
        /// <returns>ASCII implemented operating definition.</returns>
        /// <param name="page">Page 0x82.</param>
        public static string DecodePage82(byte[] page)
        {
            if(page?[1] != 0x82)
                return null;

            if(page.Length != page[3] + 4)
                return null;

            byte[] ascii = new byte[page.Length - 4];

            Array.Copy(page, 4, ascii, 0, page.Length - 4);

            return StringHandlers.CToString(ascii);
        }

        #region EVPD Page 0xB1: Manufacturer-assigned Serial Number page
        public static string DecodePageB1(byte[] page)
        {
            if(page?[1] != 0xB1)
                return null;

            if(page.Length != page[3] + 4)
                return null;

            byte[] ascii = new byte[page.Length - 4];

            Array.Copy(page, 4, ascii, 0, page.Length - 4);

            return StringHandlers.CToString(ascii).Trim();
        }
        #endregion EVPD Page 0xB1: Manufacturer-assigned Serial Number page

        #region EVPD Page 0xB2: TapeAlert Supported Flags page
        public static ulong DecodePageB2(byte[] page)
        {
            if(page?[1] != 0xB2)
                return 0;

            if(page.Length != 12)
                return 0;

            byte[] bitmap = new byte[8];

            Array.Copy(page, 4, bitmap, 0, 8);

            return BitConverter.ToUInt64(bitmap.Reverse().ToArray(), 0);
        }
        #endregion EVPD Page 0xB2: TapeAlert Supported Flags page

        #region EVPD Page 0xB3: Automation Device Serial Number page
        public static string DecodePageB3(byte[] page)
        {
            if(page?[1] != 0xB3)
                return null;

            if(page.Length != page[3] + 4)
                return null;

            byte[] ascii = new byte[page.Length - 4];

            Array.Copy(page, 4, ascii, 0, page.Length - 4);

            return StringHandlers.CToString(ascii).Trim();
        }
        #endregion EVPD Page 0xB3: Automation Device Serial Number page

        #region EVPD Page 0xB4: Data Transfer Device Element Address page
        public static string DecodePageB4(byte[] page)
        {
            if(page?[1] != 0xB3)
                return null;

            if(page.Length != page[3] + 4)
                return null;

            byte[] element = new byte[page.Length - 4];
            var    sb      = new StringBuilder();

            foreach(byte b in element)
                sb.AppendFormat("{0:X2}", b);

            return sb.ToString();
        }
        #endregion EVPD Page 0xB4: Data Transfer Device Element Address page

        #region EVPD Page 0x81: Implemented operating definition page
        /// <summary>Implemented operating definition page Page code 0x81</summary>
        public struct Page_81
        {
            /// <summary>The peripheral qualifier.</summary>
            public PeripheralQualifiers PeripheralQualifier;
            /// <summary>The type of the peripheral device.</summary>
            public PeripheralDeviceTypes PeripheralDeviceType;
            /// <summary>The page code.</summary>
            public byte PageCode;
            /// <summary>The length of the page.</summary>
            public byte PageLength;
            /// <summary>Current operating definition</summary>
            public ScsiDefinitions Current;
            /// <summary>Default operating definition</summary>
            public ScsiDefinitions Default;
            /// <summary>Support operating definition list</summary>
            public ScsiDefinitions[] Supported;
        }

        public static Page_81? DecodePage_81(byte[] pageResponse)
        {
            if(pageResponse?[1] != 0x81)
                return null;

            if(pageResponse[3] + 4 != pageResponse.Length)
                return null;

            if(pageResponse.Length < 6)
                return null;

            var decoded = new Page_81
            {
                PeripheralQualifier  = (PeripheralQualifiers)((pageResponse[0] & 0xE0) >> 5),
                PeripheralDeviceType = (PeripheralDeviceTypes)(pageResponse[0]                                  & 0x1F),
                PageLength           = (byte)(pageResponse[3] + 4), Current = (ScsiDefinitions)(pageResponse[4] & 0x7F),
                Default              = (ScsiDefinitions)(pageResponse[5]                                        & 0x7F)
            };

            int                   position    = 6;
            List<ScsiDefinitions> definitions = new List<ScsiDefinitions>();

            while(position < pageResponse.Length)
            {
                var definition = (ScsiDefinitions)(pageResponse[position] & 0x7F);
                position++;
                definitions.Add(definition);
            }

            decoded.Supported = definitions.ToArray();

            return decoded;
        }

        public static string PrettifyPage_81(byte[] pageResponse) => PrettifyPage_81(DecodePage_81(pageResponse));

        public static string DefinitionToString(ScsiDefinitions definition)
        {
            switch(definition)
            {
                case ScsiDefinitions.Current: return"";
                case ScsiDefinitions.CCS:     return"CCS";
                case ScsiDefinitions.SCSI1:   return"SCSI-1";
                case ScsiDefinitions.SCSI2:   return"SCSI-2";
                case ScsiDefinitions.SCSI3:   return"SCSI-3";
                default:                      return$"Unknown definition code {(byte)definition}";
            }
        }

        public static string PrettifyPage_81(Page_81? modePage)
        {
            if(!modePage.HasValue)
                return null;

            Page_81 page = modePage.Value;
            var     sb   = new StringBuilder();

            sb.AppendLine("SCSI Implemented operating definitions:");

            sb.AppendFormat("\tDefault operating definition: {0}", DefinitionToString(page.Current)).AppendLine();
            sb.AppendFormat("\tCurrent operating definition: {0}", DefinitionToString(page.Current)).AppendLine();

            if(page.Supported.Length == 0)
            {
                sb.AppendLine("\tThere are no supported definitions");

                return sb.ToString();
            }

            sb.AppendLine("\tSupported operating definitions:");

            foreach(ScsiDefinitions definition in page.Supported)
                sb.AppendFormat("\t\t{0}", DefinitionToString(definition)).AppendLine();

            return sb.ToString();
        }
        #endregion EVPD Page 0x81: Implemented operating definition page

        #region EVPD Page 0x83: Device identification page
        public enum IdentificationAssociation : byte
        {
            /// <summary>Identifier field is associated with the addressed logical unit</summary>
            LogicalUnit = 0,
            /// <summary>Identifier field is associated with the target port</summary>
            TargetPort = 1,
            /// <summary>Identifier field is associated with the target device that contains the LUN</summary>
            TargetDevice = 2
        }

        public enum IdentificationCodeSet : byte
        {
            /// <summary>Identifier is binary</summary>
            Binary = 1,
            /// <summary>Identifier is pure ASCII</summary>
            ASCII = 2,
            /// <summary>Identifier is in UTF-8</summary>
            UTF8 = 3
        }

        public enum IdentificationTypes : byte
        {
            /// <summary>No assignment authority was used and there is no guarantee the identifier is unique</summary>
            NoAuthority = 0,
            /// <summary>Concatenates vendor and product identifier from INQUIRY plus unit serial number from page 80h</summary>
            Inquiry = 1,
            /// <summary>Identifier is a 64-bit IEEE EUI-64, or extended</summary>
            EUI = 2,
            /// <summary>Identifier is compatible with 64-bit FC-PH Name_Identifier</summary>
            NAA = 3,
            /// <summary>Identifier to relative port in device</summary>
            Relative = 4,
            /// <summary>Identifier to group of target ports in device</summary>
            TargetPortGroup = 5,
            /// <summary>Identifier to group of target LUNs in device</summary>
            LogicalUnitGroup = 6,
            /// <summary>MD5 of device identification values</summary>
            MD5 = 7,
            /// <summary>SCSI name string</summary>
            SCSI = 8,
            /// <summary>Protocol specific port identifier</summary>
            ProtocolSpecific = 9
        }

        public struct IdentificatonDescriptor
        {
            /// <summary>Protocol identifier</summary>
            public ProtocolIdentifiers ProtocolIdentifier;
            /// <summary>Defines how the identifier is stored</summary>
            public IdentificationCodeSet CodeSet;
            /// <summary>Set if protocol identifier is valid</summary>
            public bool PIV;
            /// <summary>Identifies which decide the identifier associates with</summary>
            public IdentificationAssociation Association;
            /// <summary>Defines the type of the identifier</summary>
            public IdentificationTypes Type;
            /// <summary>Length of the identifier</summary>
            public byte Length;
            /// <summary>Identifier as a string if applicable</summary>
            public string ASCII;
            /// <summary>Binary identifier</summary>
            public byte[] Binary;
        }

        /// <summary>Device identification page Page code 0x83</summary>
        public struct Page_83
        {
            /// <summary>The peripheral qualifier.</summary>
            public PeripheralQualifiers PeripheralQualifier;
            /// <summary>The type of the peripheral device.</summary>
            public PeripheralDeviceTypes PeripheralDeviceType;
            /// <summary>The page code.</summary>
            public byte PageCode;
            /// <summary>The length of the page.</summary>
            public byte PageLength;
            /// <summary>The descriptors.</summary>
            public IdentificatonDescriptor[] Descriptors;
        }

        public static Page_83? DecodePage_83(byte[] pageResponse)
        {
            if(pageResponse?[1] != 0x83)
                return null;

            if(pageResponse[3] + 4 != pageResponse.Length)
                return null;

            if(pageResponse.Length < 6)
                return null;

            var decoded = new Page_83
            {
                PeripheralQualifier  = (PeripheralQualifiers)((pageResponse[0] & 0xE0) >> 5),
                PeripheralDeviceType = (PeripheralDeviceTypes)(pageResponse[0] & 0x1F),
                PageLength           = (byte)(pageResponse[3] + 4)
            };

            int                           position    = 4;
            List<IdentificatonDescriptor> descriptors = new List<IdentificatonDescriptor>();

            while(position < pageResponse.Length)
            {
                var descriptor = new IdentificatonDescriptor
                {
                    ProtocolIdentifier = (ProtocolIdentifiers)((pageResponse[position] & 0xF0) >> 4),
                    CodeSet            = (IdentificationCodeSet)(pageResponse[position] & 0x0F),
                    PIV                = (pageResponse[position + 1]                    & 0x80) == 0x80,
                    Association        = (IdentificationAssociation)((pageResponse[position + 1] & 0x30) >> 4),
                    Type               = (IdentificationTypes)(pageResponse[position + 1] & 0x0F),
                    Length             = pageResponse[position + 3]
                };

                descriptor.Binary = new byte[descriptor.Length];

                if(descriptor.Length + position + 4 >= pageResponse.Length)
                    descriptor.Length = (byte)(pageResponse.Length - position - 4);

                Array.Copy(pageResponse, position + 4, descriptor.Binary, 0, descriptor.Length);

                switch(descriptor.CodeSet)
                {
                    case IdentificationCodeSet.ASCII:
                        descriptor.ASCII = StringHandlers.CToString(descriptor.Binary);

                        break;
                    case IdentificationCodeSet.UTF8:
                        descriptor.ASCII = Encoding.UTF8.GetString(descriptor.Binary);

                        break;
                    default:
                        descriptor.ASCII = "";

                        break;
                }

                position += 4 + descriptor.Length;
                descriptors.Add(descriptor);
            }

            decoded.Descriptors = descriptors.ToArray();

            return decoded;
        }

        public static string PrettifyPage_83(byte[] pageResponse) => PrettifyPage_83(DecodePage_83(pageResponse));

        public static string PrettifyPage_83(Page_83? modePage)
        {
            if(!modePage.HasValue)
                return null;

            Page_83 page = modePage.Value;
            var     sb   = new StringBuilder();

            sb.AppendLine("SCSI Device identification:");

            if(page.Descriptors.Length == 0)
            {
                sb.AppendLine("\tThere are no identifiers");

                return sb.ToString();
            }

            foreach(IdentificatonDescriptor descriptor in page.Descriptors)
            {
                switch(descriptor.Association)
                {
                    case IdentificationAssociation.LogicalUnit:
                        sb.AppendLine("\tIdentifier belongs to addressed logical unit");

                        break;
                    case IdentificationAssociation.TargetPort:
                        sb.AppendLine("\tIdentifier belongs to target port");

                        break;
                    case IdentificationAssociation.TargetDevice:
                        sb.AppendLine("\tIdentifier belongs to target device that contains the addressed logical unit");

                        break;
                    default:
                        sb.AppendFormat("\tIndentifier has unknown association with code {0}",
                                        (byte)descriptor.Association).AppendLine();

                        break;
                }

                if(descriptor.PIV)
                {
                    string protocol;

                    switch(descriptor.ProtocolIdentifier)
                    {
                        case ProtocolIdentifiers.ADT:
                            protocol = "Automation/Drive Interface Transport";

                            break;
                        case ProtocolIdentifiers.ATA:
                            protocol = "AT Attachment Interface (ATA/ATAPI)";

                            break;
                        case ProtocolIdentifiers.FibreChannel:
                            protocol = "Fibre Channel";

                            break;
                        case ProtocolIdentifiers.Firewire:
                            protocol = "IEEE 1394";

                            break;
                        case ProtocolIdentifiers.iSCSI:
                            protocol = "Internet SCSI";

                            break;
                        case ProtocolIdentifiers.NoProtocol:
                            protocol = "no specific";

                            break;
                        case ProtocolIdentifiers.PCIe:
                            protocol = "PCI Express";

                            break;
                        case ProtocolIdentifiers.RDMAP:
                            protocol = "SCSI Remote Direct Memory Access";

                            break;
                        case ProtocolIdentifiers.SAS:
                            protocol = "Serial Attachment SCSI";

                            break;
                        case ProtocolIdentifiers.SCSI:
                            protocol = "Parallel SCSI";

                            break;
                        case ProtocolIdentifiers.SCSIe:
                            protocol = "SCSI over PCI Express";

                            break;
                        case ProtocolIdentifiers.SSA:
                            protocol = "SSA";

                            break;
                        case ProtocolIdentifiers.UAS:
                            protocol = "USB Attached SCSI";

                            break;
                        default:
                            protocol = $"unknown code {(byte)descriptor.ProtocolIdentifier}";

                            break;
                    }

                    sb.AppendFormat("\tDescriptor referes to {0} protocol", protocol).AppendLine();
                }

                switch(descriptor.Type)
                {
                    case IdentificationTypes.NoAuthority:
                        switch(descriptor.CodeSet)
                        {
                            case IdentificationCodeSet.ASCII:
                            case IdentificationCodeSet.UTF8:
                                sb.AppendFormat("\tVendor descriptor contains: {0}", descriptor.ASCII).AppendLine();

                                break;
                            case IdentificationCodeSet.Binary:
                                sb.AppendFormat("\tVendor descriptor contains binary data (hex): {0}",
                                                PrintHex.ByteArrayToHexArrayString(descriptor.Binary, 40)).AppendLine();

                                break;
                            default:
                                sb.AppendFormat("\tVendor descriptor contains unknown kind {1} of data (hex): {0}",
                                                PrintHex.ByteArrayToHexArrayString(descriptor.Binary, 40),
                                                (byte)descriptor.CodeSet).AppendLine();

                                break;
                        }

                        break;
                    case IdentificationTypes.Inquiry:
                        switch(descriptor.CodeSet)
                        {
                            case IdentificationCodeSet.ASCII:
                            case IdentificationCodeSet.UTF8:
                                sb.AppendFormat("\tInquiry descriptor contains: {0}", descriptor.ASCII).AppendLine();

                                break;
                            case IdentificationCodeSet.Binary:
                                sb.AppendFormat("\tInquiry descriptor contains binary data (hex): {0}",
                                                PrintHex.ByteArrayToHexArrayString(descriptor.Binary, 40)).AppendLine();

                                break;
                            default:
                                sb.AppendFormat("\tInquiry descriptor contains unknown kind {1} of data (hex): {0}",
                                                PrintHex.ByteArrayToHexArrayString(descriptor.Binary, 40),
                                                (byte)descriptor.CodeSet).AppendLine();

                                break;
                        }

                        break;
                    case IdentificationTypes.EUI:
                        if(descriptor.CodeSet == IdentificationCodeSet.ASCII ||
                           descriptor.CodeSet == IdentificationCodeSet.UTF8)
                            sb.AppendFormat("\tIEEE EUI-64: {0}", descriptor.ASCII).AppendLine();
                        else
                        {
                            sb.AppendFormat("\tIEEE EUI-64: {0:X2}", descriptor.Binary[0]);

                            for(int i = 1; i < descriptor.Binary.Length; i++)
                                sb.AppendFormat(":{0:X2}", descriptor.Binary[i]);

                            sb.AppendLine();
                        }

                        break;
                    case IdentificationTypes.NAA:
                        if(descriptor.CodeSet == IdentificationCodeSet.ASCII ||
                           descriptor.CodeSet == IdentificationCodeSet.UTF8)
                            sb.AppendFormat("\tNAA: {0}", descriptor.ASCII).AppendLine();
                        else
                        {
                            sb.AppendFormat("\tNAA: {0:X2}", descriptor.Binary[0]);

                            for(int i = 1; i < descriptor.Binary.Length; i++)
                                sb.AppendFormat(":{0:X2}", descriptor.Binary[i]);

                            sb.AppendLine();
                        }

                        break;
                    case IdentificationTypes.Relative:
                        if(descriptor.CodeSet == IdentificationCodeSet.ASCII ||
                           descriptor.CodeSet == IdentificationCodeSet.UTF8)
                            sb.AppendFormat("\tRelative target port identifier: {0}", descriptor.ASCII).AppendLine();
                        else
                            sb.AppendFormat("\tRelative target port identifier: {0}",
                                            (descriptor.Binary[2] << 8) + descriptor.Binary[3]).AppendLine();

                        break;
                    case IdentificationTypes.TargetPortGroup:
                        if(descriptor.CodeSet == IdentificationCodeSet.ASCII ||
                           descriptor.CodeSet == IdentificationCodeSet.UTF8)
                            sb.AppendFormat("\tTarget group identifier: {0}", descriptor.ASCII).AppendLine();
                        else
                            sb.AppendFormat("\tTarget group identifier: {0}",
                                            (descriptor.Binary[2] << 8) + descriptor.Binary[3]).AppendLine();

                        break;
                    case IdentificationTypes.LogicalUnitGroup:
                        if(descriptor.CodeSet == IdentificationCodeSet.ASCII ||
                           descriptor.CodeSet == IdentificationCodeSet.UTF8)
                            sb.AppendFormat("\tLogical unit group identifier: {0}", descriptor.ASCII).AppendLine();
                        else
                            sb.AppendFormat("\tLogical unit group identifier: {0}",
                                            (descriptor.Binary[2] << 8) + descriptor.Binary[3]).AppendLine();

                        break;
                    case IdentificationTypes.MD5:
                        if(descriptor.CodeSet == IdentificationCodeSet.ASCII ||
                           descriptor.CodeSet == IdentificationCodeSet.UTF8)
                            sb.AppendFormat("\tMD5 logical unit identifier: {0}", descriptor.ASCII).AppendLine();
                        else
                        {
                            sb.AppendFormat("\tMD5 logical unit identifier: {0:x2}", descriptor.Binary[0]);

                            for(int i = 1; i < descriptor.Binary.Length; i++)
                                sb.AppendFormat("{0:x2}", descriptor.Binary[i]);

                            sb.AppendLine();
                        }

                        break;
                    case IdentificationTypes.SCSI:
                        if(descriptor.CodeSet == IdentificationCodeSet.ASCII ||
                           descriptor.CodeSet == IdentificationCodeSet.UTF8)
                            sb.AppendFormat("\tSCSI name string identifier: {0}", descriptor.ASCII).AppendLine();
                        else
                            sb.AppendFormat("\tSCSI name string identifier (hex): {0}",
                                            PrintHex.ByteArrayToHexArrayString(descriptor.Binary, 40)).AppendLine();

                        break;
                    case IdentificationTypes.ProtocolSpecific:
                    {
                        if(descriptor.PIV)
                            switch(descriptor.ProtocolIdentifier)
                            {
                                case ProtocolIdentifiers.ADT:
                                    sb.
                                        AppendFormat("\tProtocol (Automation/Drive Interface Transport) specific descriptor with unknown format (hex): {0}",
                                                     PrintHex.ByteArrayToHexArrayString(descriptor.Binary, 40)).
                                        AppendLine();

                                    break;
                                case ProtocolIdentifiers.ATA:
                                    sb.
                                        AppendFormat("\tProtocol (ATA/ATAPI) specific descriptor with unknown format (hex): {0}",
                                                     PrintHex.ByteArrayToHexArrayString(descriptor.Binary, 40)).
                                        AppendLine();

                                    break;
                                case ProtocolIdentifiers.FibreChannel:
                                    sb.
                                        AppendFormat("\tProtocol (Fibre Channel) specific descriptor with unknown format (hex): {0}",
                                                     PrintHex.ByteArrayToHexArrayString(descriptor.Binary, 40)).
                                        AppendLine();

                                    break;
                                case ProtocolIdentifiers.Firewire:
                                    sb.
                                        AppendFormat("\tProtocol (IEEE 1394) specific descriptor with unknown format (hex): {0}",
                                                     PrintHex.ByteArrayToHexArrayString(descriptor.Binary, 40)).
                                        AppendLine();

                                    break;
                                case ProtocolIdentifiers.iSCSI:
                                    sb.
                                        AppendFormat("\tProtocol (Internet SCSI) specific descriptor with unknown format (hex): {0}",
                                                     PrintHex.ByteArrayToHexArrayString(descriptor.Binary, 40)).
                                        AppendLine();

                                    break;
                                case ProtocolIdentifiers.NoProtocol:
                                    sb.
                                        AppendFormat("\tProtocol (unknown) specific descriptor with unknown format (hex): {0}",
                                                     PrintHex.ByteArrayToHexArrayString(descriptor.Binary, 40)).
                                        AppendLine();

                                    break;
                                case ProtocolIdentifiers.PCIe:
                                    sb.
                                        AppendFormat("\tProtocol (PCI Express) specific descriptor with unknown format (hex): {0}",
                                                     PrintHex.ByteArrayToHexArrayString(descriptor.Binary, 40)).
                                        AppendLine();

                                    break;
                                case ProtocolIdentifiers.RDMAP:
                                    sb.
                                        AppendFormat("\tProtocol (SCSI Remote Direct Memory Access) specific descriptor with unknown format (hex): {0}",
                                                     PrintHex.ByteArrayToHexArrayString(descriptor.Binary, 40)).
                                        AppendLine();

                                    break;
                                case ProtocolIdentifiers.SAS:
                                    sb.
                                        AppendFormat("\tProtocol (Serial Attachment SCSI) specific descriptor with unknown format (hex): {0}",
                                                     PrintHex.ByteArrayToHexArrayString(descriptor.Binary, 40)).
                                        AppendLine();

                                    break;
                                case ProtocolIdentifiers.SCSI:
                                    sb.
                                        AppendFormat("\tProtocol (Parallel SCSI) specific descriptor with unknown format (hex): {0}",
                                                     PrintHex.ByteArrayToHexArrayString(descriptor.Binary, 40)).
                                        AppendLine();

                                    break;
                                case ProtocolIdentifiers.SSA:
                                    sb.
                                        AppendFormat("\tProtocol (SSA) specific descriptor with unknown format (hex): {0}",
                                                     PrintHex.ByteArrayToHexArrayString(descriptor.Binary, 40)).
                                        AppendLine();

                                    break;
                                case ProtocolIdentifiers.SCSIe:
                                    sb.AppendFormat("\tProtocol (SCSIe) specific descriptor: Routing ID is {0}",
                                                    (descriptor.Binary[0] << 8) + descriptor.Binary[1]).AppendLine();

                                    break;
                                case ProtocolIdentifiers.UAS:
                                    sb.
                                        AppendFormat("\tProtocol (UAS) specific descriptor: USB address {0} interface {1}",
                                                     descriptor.Binary[0] & 0x7F, descriptor.Binary[2]).AppendLine();

                                    break;
                                default:
                                    sb.
                                        AppendFormat("\tProtocol (unknown code {0}) specific descriptor with unknown format (hex): {1}",
                                                     (byte)descriptor.ProtocolIdentifier,
                                                     PrintHex.ByteArrayToHexArrayString(descriptor.Binary, 40)).
                                        AppendLine();

                                    break;
                            }
                    }

                        break;
                    default:
                        switch(descriptor.CodeSet)
                        {
                            case IdentificationCodeSet.ASCII:
                            case IdentificationCodeSet.UTF8:
                                sb.AppendFormat("\tUnknown descriptor type {1} contains: {0}", descriptor.ASCII,
                                                (byte)descriptor.Type).AppendLine();

                                break;
                            case IdentificationCodeSet.Binary:
                                sb.AppendFormat("\tUnknown descriptor type {1} contains binary data (hex): {0}",
                                                PrintHex.ByteArrayToHexArrayString(descriptor.Binary, 40),
                                                (byte)descriptor.Type).AppendLine();

                                break;
                            default:
                                sb.
                                    AppendFormat("Inquiry descriptor type {2} contains unknown kind {1} of data (hex): {0}",
                                                 PrintHex.ByteArrayToHexArrayString(descriptor.Binary, 40),
                                                 (byte)descriptor.CodeSet, (byte)descriptor.Type).AppendLine();

                                break;
                        }

                        break;
                }
            }

            return sb.ToString();
        }
        #endregion EVPD Page 0x83: Device identification page

        #region EVPD Page 0x84: Software Interface Identification page
        public struct SoftwareIdentifier
        {
            /// <summary>EUI-48 identifier</summary>
            public byte[] Identifier;
        }

        /// <summary>Software Interface Identification page Page code 0x84</summary>
        public struct Page_84
        {
            /// <summary>The peripheral qualifier.</summary>
            public PeripheralQualifiers PeripheralQualifier;
            /// <summary>The type of the peripheral device.</summary>
            public PeripheralDeviceTypes PeripheralDeviceType;
            /// <summary>The page code.</summary>
            public byte PageCode;
            /// <summary>The length of the page.</summary>
            public byte PageLength;
            /// <summary>The descriptors.</summary>
            public SoftwareIdentifier[] Identifiers;
        }

        public static Page_84? DecodePage_84(byte[] pageResponse)
        {
            if(pageResponse?[1] != 0x84)
                return null;

            if(pageResponse[3] + 4 != pageResponse.Length)
                return null;

            if(pageResponse.Length < 10)
                return null;

            var decoded = new Page_84
            {
                PeripheralQualifier  = (PeripheralQualifiers)((pageResponse[0] & 0xE0) >> 5),
                PeripheralDeviceType = (PeripheralDeviceTypes)(pageResponse[0] & 0x1F),
                PageLength           = (byte)(pageResponse[3] + 4)
            };

            int                      position    = 4;
            List<SoftwareIdentifier> identifiers = new List<SoftwareIdentifier>();

            while(position < pageResponse.Length)
            {
                var identifier = new SoftwareIdentifier
                {
                    Identifier = new byte[6]
                };

                Array.Copy(pageResponse, position, identifier.Identifier, 0, 6);
                identifiers.Add(identifier);
                position += 6;
            }

            decoded.Identifiers = identifiers.ToArray();

            return decoded;
        }

        public static string PrettifyPage_84(byte[] pageResponse) => PrettifyPage_84(DecodePage_84(pageResponse));

        public static string PrettifyPage_84(Page_84? modePage)
        {
            if(!modePage.HasValue)
                return null;

            Page_84 page = modePage.Value;
            var     sb   = new StringBuilder();

            sb.AppendLine("SCSI Software Interface Identifiers:");

            if(page.Identifiers.Length == 0)
            {
                sb.AppendLine("\tThere are no identifiers");

                return sb.ToString();
            }

            foreach(SoftwareIdentifier identifier in page.Identifiers)
            {
                sb.AppendFormat("\t{0:X2}", identifier.Identifier[0]);

                for(int i = 1; i < identifier.Identifier.Length; i++)
                    sb.AppendFormat(":{0:X2}", identifier.Identifier[i]);

                sb.AppendLine();
            }

            return sb.ToString();
        }
        #endregion EVPD Page 0x84: Software Interface Identification page

        #region EVPD Page 0x85: Management Network Addresses page
        public enum NetworkServiceTypes : byte
        {
            Unspecified = 0, StorageConf    = 1, Diagnostics  = 2,
            Status      = 3, Logging        = 4, CodeDownload = 5,
            CopyService = 6, Administrative = 7
        }

        public struct NetworkDescriptor
        {
            /// <summary>Identifies which device the identifier associates with</summary>
            public IdentificationAssociation Association;
            /// <summary>Defines the type of the identifier</summary>
            public NetworkServiceTypes Type;
            /// <summary>Length of the identifier</summary>
            public ushort Length;
            /// <summary>Binary identifier</summary>
            public byte[] Address;
        }

        /// <summary>Device identification page Page code 0x85</summary>
        public struct Page_85
        {
            /// <summary>The peripheral qualifier.</summary>
            public PeripheralQualifiers PeripheralQualifier;
            /// <summary>The type of the peripheral device.</summary>
            public PeripheralDeviceTypes PeripheralDeviceType;
            /// <summary>The page code.</summary>
            public byte PageCode;
            /// <summary>The length of the page.</summary>
            public ushort PageLength;
            /// <summary>The descriptors.</summary>
            public NetworkDescriptor[] Descriptors;
        }

        public static Page_85? DecodePage_85(byte[] pageResponse)
        {
            if(pageResponse?[1] != 0x85)
                return null;

            if((pageResponse[2] << 8) + pageResponse[3] + 4 != pageResponse.Length)
                return null;

            if(pageResponse.Length < 4)
                return null;

            var decoded = new Page_85
            {
                PeripheralQualifier  = (PeripheralQualifiers)((pageResponse[0] & 0xE0) >> 5),
                PeripheralDeviceType = (PeripheralDeviceTypes)(pageResponse[0] & 0x1F),
                PageLength           = (ushort)((pageResponse[2] << 8) + pageResponse[3] + 4)
            };

            int                     position    = 4;
            List<NetworkDescriptor> descriptors = new List<NetworkDescriptor>();

            while(position < pageResponse.Length)
            {
                var descriptor = new NetworkDescriptor
                {
                    Association = (IdentificationAssociation)((pageResponse[position] & 0x60) >> 5),
                    Type        = (NetworkServiceTypes)(pageResponse[position] & 0x1F),
                    Length      = (ushort)((pageResponse[position + 2] << 8) + pageResponse[position + 3])
                };

                descriptor.Address = new byte[descriptor.Length];
                Array.Copy(pageResponse, position + 4, descriptor.Address, 0, descriptor.Length);

                position += 4 + descriptor.Length;
                descriptors.Add(descriptor);
            }

            decoded.Descriptors = descriptors.ToArray();

            return decoded;
        }

        public static string PrettifyPage_85(byte[] pageResponse) => PrettifyPage_85(DecodePage_85(pageResponse));

        public static string PrettifyPage_85(Page_85? modePage)
        {
            if(!modePage.HasValue)
                return null;

            Page_85 page = modePage.Value;
            var     sb   = new StringBuilder();

            sb.AppendLine("SCSI Management Network Addresses:");

            if(page.Descriptors.Length == 0)
            {
                sb.AppendLine("\tThere are no addresses");

                return sb.ToString();
            }

            foreach(NetworkDescriptor descriptor in page.Descriptors)
            {
                switch(descriptor.Association)
                {
                    case IdentificationAssociation.LogicalUnit:
                        sb.AppendLine("\tIdentifier belongs to addressed logical unit");

                        break;
                    case IdentificationAssociation.TargetPort:
                        sb.AppendLine("\tIdentifier belongs to target port");

                        break;
                    case IdentificationAssociation.TargetDevice:
                        sb.AppendLine("\tIdentifier belongs to target device that contains the addressed logical unit");

                        break;
                    default:
                        sb.AppendFormat("\tIndentifier has unknown association with code {0}",
                                        (byte)descriptor.Association).AppendLine();

                        break;
                }

                switch(descriptor.Type)
                {
                    case NetworkServiceTypes.CodeDownload:
                        sb.AppendFormat("Address for code download: {0}", StringHandlers.CToString(descriptor.Address)).
                           AppendLine();

                        break;
                    case NetworkServiceTypes.Diagnostics:
                        sb.AppendFormat("Address for diagnostics: {0}", StringHandlers.CToString(descriptor.Address)).
                           AppendLine();

                        break;
                    case NetworkServiceTypes.Logging:
                        sb.AppendFormat("Address for logging: {0}", StringHandlers.CToString(descriptor.Address)).
                           AppendLine();

                        break;
                    case NetworkServiceTypes.Status:
                        sb.AppendFormat("Address for status: {0}", StringHandlers.CToString(descriptor.Address)).
                           AppendLine();

                        break;
                    case NetworkServiceTypes.StorageConf:
                        sb.AppendFormat("Address for storage configuration service: {0}",
                                        StringHandlers.CToString(descriptor.Address)).AppendLine();

                        break;
                    case NetworkServiceTypes.Unspecified:
                        sb.AppendFormat("Unspecified address: {0}", StringHandlers.CToString(descriptor.Address)).
                           AppendLine();

                        break;
                    case NetworkServiceTypes.CopyService:
                        sb.AppendFormat("Address for copy service: {0}", StringHandlers.CToString(descriptor.Address)).
                           AppendLine();

                        break;
                    case NetworkServiceTypes.Administrative:
                        sb.AppendFormat("Address for administrative configuration service: {0}",
                                        StringHandlers.CToString(descriptor.Address)).AppendLine();

                        break;
                    default:
                        sb.AppendFormat("Address of unknown type {1}: {0}",
                                        StringHandlers.CToString(descriptor.Address), (byte)descriptor.Type).
                           AppendLine();

                        break;
                }
            }

            return sb.ToString();
        }
        #endregion EVPD Page 0x85: Management Network Addresses page

        #region EVPD Page 0x86: Extended INQUIRY data page
        /// <summary>Device identification page Page code 0x86</summary>
        public struct Page_86
        {
            /// <summary>The peripheral qualifier.</summary>
            public PeripheralQualifiers PeripheralQualifier;
            /// <summary>The type of the peripheral device.</summary>
            public PeripheralDeviceTypes PeripheralDeviceType;
            /// <summary>The page code.</summary>
            public byte PageCode;
            /// <summary>The length of the page.</summary>
            public byte PageLength;
            /// <summary>Indicates how a device server activates microcode</summary>
            public byte ActivateMicrocode;
            /// <summary>Protection types supported by device</summary>
            public byte SPT;
            /// <summary>Checks logical block guard field</summary>
            public bool GRD_CHK;
            /// <summary>Checks logical block application tag</summary>
            public bool APP_CHK;
            /// <summary>Checks logical block reference</summary>
            public bool REF_CHK;
            /// <summary>Supports unit attention condition sense key specific data</summary>
            public bool UASK_SUP;
            /// <summary>Supports grouping</summary>
            public bool GROUP_SUP;
            /// <summary>Supports priority</summary>
            public bool PRIOR_SUP;
            /// <summary>Supports head of queue</summary>
            public bool HEADSUP;
            /// <summary>Supports ordered</summary>
            public bool ORDSUP;
            /// <summary>Supports simple</summary>
            public bool SIMPSUP;
            /// <summary>Supports marking a block as uncorrectable</summary>
            public bool WU_SUP;
            /// <summary>Supports disabling correction on WRITE LONG</summary>
            public bool CRD_SUP;
            /// <summary>Supports a non-volatile cache</summary>
            public bool NV_SUP;
            /// <summary>Supports a volatile cache</summary>
            public bool V_SUP;
            /// <summary>Disable protection information checks</summary>
            public bool NO_PI_CHK;
            /// <summary>Protection information interval supported</summary>
            public bool P_I_I_SUP;
            /// <summary>Clears all LUNs unit attention when clearing one</summary>
            public bool LUICLR;
            /// <summary>Referrals support</summary>
            public bool R_SUP;
            /// <summary>History snapshots release effects</summary>
            public bool HSSRELEF;
            /// <summary>Capability based command security</summary>
            public bool CBCS;
            /// <summary>Indicates how it handles microcode updating with multiple nexuxes</summary>
            public byte Nexus;
            /// <summary>Time to complete extended self-test</summary>
            public ushort ExtendedTestMinutes;
            /// <summary>Power on activation support</summary>
            public bool POA_SUP;
            /// <summary>Hard reset actication</summary>
            public bool HRA_SUP;
            /// <summary>Vendor specific activation</summary>
            public bool VSA_SUP;
            /// <summary>Maximum length in bytes of sense data</summary>
            public byte MaximumSenseLength;
        }

        public static Page_86? DecodePage_86(byte[] pageResponse)
        {
            if(pageResponse?[1] != 0x86)
                return null;

            if(pageResponse[3] + 4 != pageResponse.Length)
                return null;

            if(pageResponse.Length < 64)
                return null;

            return new Page_86
            {
                PeripheralQualifier  = (PeripheralQualifiers)((pageResponse[0] & 0xE0) >> 5),
                PeripheralDeviceType = (PeripheralDeviceTypes)(pageResponse[0] & 0x1F),
                PageLength           = (byte)(pageResponse[3] + 4),
                ActivateMicrocode    = (byte)((pageResponse[4] & 0xC0) >> 6),
                SPT =
                    (byte)((pageResponse[4] & 0x38) >> 3),
                GRD_CHK = (pageResponse[4] & 0x04) == 0x04,
                APP_CHK =
                    (pageResponse
                         [4] &
                     0x02) == 0x02,
                REF_CHK = (pageResponse[4] & 0x01) == 0x01,
                UASK_SUP =
                    (pageResponse
                         [5] &
                     0x20) == 0x20,
                GROUP_SUP = (pageResponse[5] & 0x10) == 0x10,
                PRIOR_SUP =
                    (pageResponse
                         [5] &
                     0x08) == 0x08,
                HEADSUP = (pageResponse[5] & 0x04) == 0x04,
                ORDSUP =
                    (pageResponse
                         [5] &
                     0x02) == 0x02,
                SIMPSUP = (pageResponse[5] & 0x01) == 0x01,
                WU_SUP =
                    (pageResponse
                         [6] &
                     0x08) == 0x08,
                CRD_SUP = (pageResponse[6] & 0x04) == 0x04,
                NV_SUP =
                    (pageResponse
                         [6] &
                     0x02) == 0x02,
                V_SUP = (pageResponse[6] & 0x01) == 0x01,
                NO_PI_CHK =
                    (pageResponse
                         [7] &
                     0x20) == 0x20,
                P_I_I_SUP = (pageResponse[7] & 0x10) == 0x10,
                LUICLR =
                    (pageResponse
                         [7] &
                     0x01) == 0x01,
                R_SUP = (pageResponse[8] & 0x10) == 0x10,
                HSSRELEF =
                    (pageResponse
                         [8] &
                     0x02) == 0x02,
                CBCS = (pageResponse[8] & 0x01) == 0x01,
                Nexus =
                    (byte)(pageResponse
                               [9] &
                           0x0F),
                ExtendedTestMinutes = (ushort)((pageResponse[10] << 8) + pageResponse[11]),
                POA_SUP             = (pageResponse[12] & 0x80) == 0x80,
                HRA_SUP             = (pageResponse[12] & 0x40) == 0x40,
                VSA_SUP             = (pageResponse[12] & 0x20) == 0x20, MaximumSenseLength = pageResponse[13]
            };
        }

        public static string PrettifyPage_86(byte[] pageResponse) => PrettifyPage_86(DecodePage_86(pageResponse));

        public static string PrettifyPage_86(Page_86? modePage)
        {
            if(!modePage.HasValue)
                return null;

            Page_86 page = modePage.Value;
            var     sb   = new StringBuilder();

            sb.AppendLine("SCSI Extended INQUIRY Data:");

            switch(page.PeripheralDeviceType)
            {
                case PeripheralDeviceTypes.DirectAccess:
                case PeripheralDeviceTypes.SCSIZonedBlockDevice:
                    switch(page.SPT)
                    {
                        case 0:
                            sb.AppendLine("Logical unit supports type 1 protection");

                            break;
                        case 1:
                            sb.AppendLine("Logical unit supports types 1 and 2 protection");

                            break;
                        case 2:
                            sb.AppendLine("Logical unit supports type 2 protection");

                            break;
                        case 3:
                            sb.AppendLine("Logical unit supports types 1 and 3 protection");

                            break;
                        case 4:
                            sb.AppendLine("Logical unit supports type 3 protection");

                            break;
                        case 5:
                            sb.AppendLine("Logical unit supports types 2 and 3 protection");

                            break;
                        case 7:
                            sb.AppendLine("Logical unit supports types 1, 2 and 3 protection");

                            break;
                        default:
                            sb.AppendFormat("Logical unit supports unknown protection defined by code {0}", page.SPT).
                               AppendLine();

                            break;
                    }

                    break;
                case PeripheralDeviceTypes.SequentialAccess when page.SPT == 1:
                    sb.AppendLine("Logical unit supports logical block protection");

                    break;
            }

            if(page.GRD_CHK)
                sb.AppendLine("Device checks the logical block guard");

            if(page.APP_CHK)
                sb.AppendLine("Device checks the logical block application tag");

            if(page.REF_CHK)
                sb.AppendLine("Device checks the logical block reference tag");

            if(page.UASK_SUP)
                sb.AppendLine("Device supports unit attention condition sense key specific data");

            if(page.GROUP_SUP)
                sb.AppendLine("Device supports grouping");

            if(page.PRIOR_SUP)
                sb.AppendLine("Device supports priority");

            if(page.HEADSUP)
                sb.AppendLine("Device supports head of queue");

            if(page.ORDSUP)
                sb.AppendLine("Device supports the ORDERED task attribute");

            if(page.SIMPSUP)
                sb.AppendLine("Device supports the SIMPLE task attribute");

            if(page.WU_SUP)
                sb.AppendLine("Device supports marking a block as uncorrectable with WRITE LONG");

            if(page.CRD_SUP)
                sb.AppendLine("Device supports disabling correction with WRITE LONG");

            if(page.NV_SUP)
                sb.AppendLine("Device has a non-volatile cache");

            if(page.V_SUP)
                sb.AppendLine("Device has a volatile cache");

            if(page.NO_PI_CHK)
                sb.AppendLine("Device has disabled protection information checks");

            if(page.P_I_I_SUP)
                sb.AppendLine("Device supports protection information intervals");

            if(page.LUICLR)
                sb.AppendLine("Device clears any unit attention condition in all LUNs after reporting for any LUN");

            if(page.R_SUP)
                sb.AppendLine("Device supports referrals");

            if(page.HSSRELEF)
                sb.AppendLine("Devoce implements alternate reset handling");

            if(page.CBCS)
                sb.AppendLine("Device supports capability-based command security");

            if(page.POA_SUP)
                sb.AppendLine("Device supports power-on activation for new microcode");

            if(page.HRA_SUP)
                sb.AppendLine("Device supports hard reset activation for new microcode");

            if(page.VSA_SUP)
                sb.AppendLine("Device supports vendor specific activation for new microcode");

            if(page.ExtendedTestMinutes > 0)
                sb.AppendFormat("Extended self-test takes {0} to complete",
                                TimeSpan.FromMinutes(page.ExtendedTestMinutes)).AppendLine();

            if(page.MaximumSenseLength > 0)
                sb.AppendFormat("Device supports a maximum of {0} bytes for sense data", page.MaximumSenseLength).
                   AppendLine();

            return sb.ToString();
        }
        #endregion EVPD Page 0x86: Extended INQUIRY data page

        #region EVPD Page 0x89: ATA Information page
        /// <summary>ATA Information page Page code 0x89</summary>
        public struct Page_89
        {
            /// <summary>The peripheral qualifier.</summary>
            public PeripheralQualifiers PeripheralQualifier;
            /// <summary>The type of the peripheral device.</summary>
            public PeripheralDeviceTypes PeripheralDeviceType;
            /// <summary>The page code.</summary>
            public byte PageCode;
            /// <summary>The length of the page.</summary>
            public ushort PageLength;
            /// <summary>Contains the SAT vendor identification</summary>
            public byte[] VendorIdentification;
            /// <summary>Contains the SAT product identification</summary>
            public byte[] ProductIdentification;
            /// <summary>Contains the SAT revision level</summary>
            public byte[] ProductRevisionLevel;
            /// <summary>Contains the ATA device signature</summary>
            public byte[] Signature;
            /// <summary>Contains the command code used to identify the device</summary>
            public byte CommandCode;
            /// <summary>Contains the response to ATA IDENTIFY (PACKET) DEVICE</summary>
            public byte[] IdentifyData;
        }

        public static Page_89? DecodePage_89(byte[] pageResponse)
        {
            if(pageResponse?[1] != 0x89)
                return null;

            if((pageResponse[2] << 8) + pageResponse[3] + 4 != pageResponse.Length)
                return null;

            if(pageResponse.Length < 572)
                return null;

            var decoded = new Page_89
            {
                PeripheralQualifier   = (PeripheralQualifiers)((pageResponse[0] & 0xE0) >> 5),
                PeripheralDeviceType  = (PeripheralDeviceTypes)(pageResponse[0] & 0x1F),
                PageLength            = (ushort)((pageResponse[2] << 8) + pageResponse[3] + 4),
                VendorIdentification  = new byte[8],
                ProductIdentification = new byte[16],
                ProductRevisionLevel  = new byte[4], Signature = new byte[20],
                IdentifyData          = new byte[512]
            };

            Array.Copy(pageResponse, 8, decoded.VendorIdentification, 0, 8);
            Array.Copy(pageResponse, 16, decoded.ProductIdentification, 0, 16);
            Array.Copy(pageResponse, 32, decoded.ProductRevisionLevel, 0, 4);
            Array.Copy(pageResponse, 36, decoded.Signature, 0, 20);
            decoded.CommandCode = pageResponse[56];
            Array.Copy(pageResponse, 60, decoded.IdentifyData, 0, 512);

            return decoded;
        }

        public static string PrettifyPage_89(byte[] pageResponse) => PrettifyPage_89(DecodePage_89(pageResponse));

        // TODO: Decode ATA signature?
        public static string PrettifyPage_89(Page_89? modePage)
        {
            if(!modePage.HasValue)
                return null;

            Page_89 page = modePage.Value;
            var     sb   = new StringBuilder();

            sb.AppendLine("SCSI to ATA Translation Layer Data:");

            sb.AppendFormat("\tTranslation layer vendor: {0}",
                            VendorString.Prettify(StringHandlers.CToString(page.VendorIdentification).Trim())).
               AppendLine();

            sb.AppendFormat("\tTranslation layer name: {0}",
                            StringHandlers.CToString(page.ProductIdentification).Trim()).AppendLine();

            sb.AppendFormat("\tTranslation layer release level: {0}",
                            StringHandlers.CToString(page.ProductRevisionLevel).Trim()).AppendLine();

            switch(page.CommandCode)
            {
                case 0xEC:
                    sb.AppendLine("\tDevice responded to ATA IDENTIFY DEVICE command.");

                    break;
                case 0xA1:
                    sb.AppendLine("\tDevice responded to ATA IDENTIFY PACKET DEVICE command.");

                    break;
                default:
                    sb.AppendFormat("\tDevice responded to ATA command {0:X2}h", page.CommandCode).AppendLine();

                    break;
            }

            switch(page.Signature[0])
            {
                case 0x00:
                    sb.AppendLine("\tDevice uses Parallel ATA.");

                    break;
                case 0x34:
                    sb.AppendLine("\tDevice uses Serial ATA.");

                    break;
                default:
                    sb.AppendFormat("\tDevice uses unknown transport with code {0}", page.Signature[0]).AppendLine();

                    break;
            }

            Identify.IdentifyDevice? id = Identify.Decode(page.IdentifyData);

            if(id != null)
            {
                sb.AppendLine("\tATA IDENTIFY information follows:");
                sb.AppendFormat("{0}", ATA.Identify.Prettify(id)).AppendLine();
            }
            else
                sb.AppendLine("\tCould not decode ATA IDENTIFY information");

            return sb.ToString();
        }
        #endregion EVPD Page 0x89: ATA Information page

        #region EVPD Page 0xC0 (Quantum): Firmware Build Information page
        /// <summary>Firmware Build Information page Page code 0xC0 (Quantum)</summary>
        public struct Page_C0_Quantum
        {
            /// <summary>The peripheral qualifier.</summary>
            public PeripheralQualifiers PeripheralQualifier;
            /// <summary>The type of the peripheral device.</summary>
            public PeripheralDeviceTypes PeripheralDeviceType;
            /// <summary>The page code.</summary>
            public byte PageCode;
            /// <summary>The length of the page.</summary>
            public byte PageLength;
            /// <summary>Servo firmware checksum</summary>
            public ushort ServoFirmwareChecksum;
            /// <summary>Servo EEPROM checksum</summary>
            public ushort ServoEEPROMChecksum;
            /// <summary>Read/Write firmware checksum</summary>
            public uint ReadWriteFirmwareChecksum;
            /// <summary>Read/Write firmware build data</summary>
            public byte[] ReadWriteFirmwareBuildData;
        }

        public static Page_C0_Quantum? DecodePage_C0_Quantum(byte[] pageResponse)
        {
            if(pageResponse?[1] != 0xC0)
                return null;

            if(pageResponse[3] != 20)
                return null;

            if(pageResponse.Length != 36)
                return null;

            var decoded = new Page_C0_Quantum
            {
                PeripheralQualifier   = (PeripheralQualifiers)((pageResponse[0] & 0xE0) >> 5),
                PeripheralDeviceType  = (PeripheralDeviceTypes)(pageResponse[0] & 0x1F),
                PageLength            = (byte)(pageResponse[3]          + 4),
                ServoFirmwareChecksum = (ushort)((pageResponse[4] << 8) + pageResponse[5]),
                ServoEEPROMChecksum   = (ushort)((pageResponse[6] << 8) + pageResponse[7]),
                ReadWriteFirmwareChecksum = (uint)((pageResponse[8]  << 24) + (pageResponse[9] << 16) +
                                                   (pageResponse[10] << 8)  + pageResponse[11]),
                ReadWriteFirmwareBuildData = new byte[24]
            };

            Array.Copy(pageResponse, 12, decoded.ReadWriteFirmwareBuildData, 0, 24);

            return decoded;
        }

        public static string PrettifyPage_C0_Quantum(byte[] pageResponse) =>
            PrettifyPage_C0_Quantum(DecodePage_C0_Quantum(pageResponse));

        public static string PrettifyPage_C0_Quantum(Page_C0_Quantum? modePage)
        {
            if(!modePage.HasValue)
                return null;

            Page_C0_Quantum page = modePage.Value;
            var             sb   = new StringBuilder();

            sb.AppendLine("Quantum Firmware Build Information page:");

            sb.AppendFormat("\tServo firmware checksum: 0x{0:X4}", page.ServoFirmwareChecksum).AppendLine();
            sb.AppendFormat("\tEEPROM firmware checksum: 0x{0:X4}", page.ServoEEPROMChecksum).AppendLine();
            sb.AppendFormat("\tRead/write firmware checksum: 0x{0:X8}", page.ReadWriteFirmwareChecksum).AppendLine();

            sb.AppendFormat("\tRead/write firmware build date: {0}",
                            StringHandlers.CToString(page.ReadWriteFirmwareBuildData)).AppendLine();

            return sb.ToString();
        }
        #endregion EVPD Page 0xC0 (Quantum): Firmware Build Information page

        #region EVPD Pages 0xC0, 0xC1 (Certance): Drive component revision level pages
        /// <summary>Drive component revision level pages Page codes 0xC0, 0xC1 (Certance)</summary>
        public struct Page_C0_C1_Certance
        {
            /// <summary>The peripheral qualifier.</summary>
            public PeripheralQualifiers PeripheralQualifier;
            /// <summary>The type of the peripheral device.</summary>
            public PeripheralDeviceTypes PeripheralDeviceType;
            /// <summary>The page code.</summary>
            public byte PageCode;
            /// <summary>The length of the page.</summary>
            public byte PageLength;
            public byte[] Component;
            public byte[] Version;
            public byte[] Date;
            public byte[] Variant;
        }

        public static Page_C0_C1_Certance? DecodePage_C0_C1_Certance(byte[] pageResponse)
        {
            if(pageResponse == null)
                return null;

            if(pageResponse[1] != 0xC0 &&
               pageResponse[1] != 0xC1)
                return null;

            if(pageResponse[3] != 92)
                return null;

            if(pageResponse.Length != 96)
                return null;

            var decoded = new Page_C0_C1_Certance
            {
                PeripheralQualifier  = (PeripheralQualifiers)((pageResponse[0] & 0xE0) >> 5),
                PeripheralDeviceType = (PeripheralDeviceTypes)(pageResponse[0] & 0x1F),
                PageLength           = (byte)(pageResponse[3] + 4), Component = new byte[26], Version = new byte[19],
                Date                 = new byte[24], Variant                  = new byte[23]
            };

            Array.Copy(pageResponse, 4, decoded.Component, 0, 26);
            Array.Copy(pageResponse, 30, decoded.Version, 0, 19);
            Array.Copy(pageResponse, 49, decoded.Date, 0, 24);
            Array.Copy(pageResponse, 73, decoded.Variant, 0, 23);

            return decoded;
        }

        public static string PrettifyPage_C0_C1_Certance(byte[] pageResponse) =>
            PrettifyPage_C0_C1_Certance(DecodePage_C0_C1_Certance(pageResponse));

        public static string PrettifyPage_C0_C1_Certance(Page_C0_C1_Certance? modePage)
        {
            if(!modePage.HasValue)
                return null;

            Page_C0_C1_Certance page = modePage.Value;
            var                 sb   = new StringBuilder();

            sb.AppendLine("Certance Drive Component Revision Levels page:");

            sb.AppendFormat("\tComponent: {0}", StringHandlers.CToString(page.Component)).AppendLine();
            sb.AppendFormat("\tVersion: {0}", StringHandlers.CToString(page.Version)).AppendLine();
            sb.AppendFormat("\tDate: {0}", StringHandlers.CToString(page.Date)).AppendLine();
            sb.AppendFormat("\tVariant: {0}", StringHandlers.CToString(page.Variant)).AppendLine();

            return sb.ToString();
        }
        #endregion EVPD Pages 0xC0, 0xC1 (Certance): Drive component revision level pages

        #region EVPD Pages 0xC2, 0xC3, 0xC4, 0xC5, 0xC6 (Certance): Drive component serial number pages
        /// <summary>Drive component serial number pages Page codes 0xC2, 0xC3, 0xC4, 0xC5, 0xC6 (Certance)</summary>
        public struct Page_C2_C3_C4_C5_C6_Certance
        {
            /// <summary>The peripheral qualifier.</summary>
            public PeripheralQualifiers PeripheralQualifier;
            /// <summary>The type of the peripheral device.</summary>
            public PeripheralDeviceTypes PeripheralDeviceType;
            /// <summary>The page code.</summary>
            public byte PageCode;
            /// <summary>The length of the page.</summary>
            public byte PageLength;
            public byte[] SerialNumber;
        }

        public static Page_C2_C3_C4_C5_C6_Certance? DecodePage_C2_C3_C4_C5_C6_Certance(byte[] pageResponse)
        {
            if(pageResponse == null)
                return null;

            if(pageResponse[1] != 0xC2 &&
               pageResponse[1] != 0xC3 &&
               pageResponse[1] != 0xC4 &&
               pageResponse[1] != 0xC5 &&
               pageResponse[1] != 0xC6)
                return null;

            if(pageResponse[3] != 12)
                return null;

            if(pageResponse.Length != 16)
                return null;

            var decoded = new Page_C2_C3_C4_C5_C6_Certance
            {
                PeripheralQualifier  = (PeripheralQualifiers)((pageResponse[0] & 0xE0) >> 5),
                PeripheralDeviceType = (PeripheralDeviceTypes)(pageResponse[0] & 0x1F),
                PageLength           = (byte)(pageResponse[3] + 4), SerialNumber = new byte[12]
            };

            Array.Copy(pageResponse, 4, decoded.SerialNumber, 0, 12);

            return decoded;
        }

        public static string PrettifyPage_C2_C3_C4_C5_C6_Certance(byte[] pageResponse) =>
            PrettifyPage_C2_C3_C4_C5_C6_Certance(DecodePage_C2_C3_C4_C5_C6_Certance(pageResponse));

        public static string PrettifyPage_C2_C3_C4_C5_C6_Certance(Page_C2_C3_C4_C5_C6_Certance? modePage)
        {
            if(!modePage.HasValue)
                return null;

            Page_C2_C3_C4_C5_C6_Certance page = modePage.Value;
            var                          sb   = new StringBuilder();

            sb.AppendLine("Certance Drive Component Serial Number page:");

            switch(page.PageCode)
            {
                case 0xC2:
                    sb.AppendFormat("\tHead Assembly Serial Number: {0}", StringHandlers.CToString(page.SerialNumber)).
                       AppendLine();

                    break;
                case 0xC3:
                    sb.AppendFormat("\tReel Motor 1 Serial Number: {0}", StringHandlers.CToString(page.SerialNumber)).
                       AppendLine();

                    break;
                case 0xC4:
                    sb.AppendFormat("\tReel Motor 2 Serial Number: {0}", StringHandlers.CToString(page.SerialNumber)).
                       AppendLine();

                    break;
                case 0xC5:
                    sb.AppendFormat("\tBoard Serial Number: {0}", StringHandlers.CToString(page.SerialNumber)).
                       AppendLine();

                    break;
                case 0xC6:
                    sb.AppendFormat("\tBase Mechanical Serial Number: {0}",
                                    StringHandlers.CToString(page.SerialNumber)).AppendLine();

                    break;
            }

            return sb.ToString();
        }
        #endregion EVPD Pages 0xC0, 0xC1 (Certance): Drive component revision level pages

        #region EVPD Page 0xDF (Certance): Drive status pages
        /// <summary>Drive status pages Page codes 0xDF (Certance)</summary>
        public struct Page_DF_Certance
        {
            /// <summary>The peripheral qualifier.</summary>
            public PeripheralQualifiers PeripheralQualifier;
            /// <summary>The type of the peripheral device.</summary>
            public PeripheralDeviceTypes PeripheralDeviceType;
            /// <summary>The page code.</summary>
            public byte PageCode;
            /// <summary>The length of the page.</summary>
            public byte PageLength;
            /// <summary>Command forwarding</summary>
            public byte CmdFwd;
            /// <summary>Alerts</summary>
            public bool Alerts;
            /// <summary>Removable prevention</summary>
            public bool NoRemov;
            /// <summary>Unit reservation</summary>
            public bool UnitRsvd;
            /// <summary>Needs cleaning</summary>
            public bool Clean;
            /// <summary>Tape threaded</summary>
            public bool Threaded;
            /// <summary>Commands await forwarding</summary>
            public bool Lun1Cmd;
            /// <summary>Autoload mode</summary>
            public byte AutoloadMode;
            /// <summary>Cartridge type</summary>
            public byte CartridgeType;
            /// <summary>Cartridge format</summary>
            public byte CartridgeFormat;
            /// <summary>Cartridge capacity in 10e9 bytes</summary>
            public ushort CartridgeCapacity;
            /// <summary>Port A transport type</summary>
            public byte PortATransportType;
            /// <summary>Port A SCSI ID</summary>
            public byte PortASelectionID;
            /// <summary>Total number of head-tape contact time</summary>
            public uint OperatingHours;
            /// <summary>ID that reserved the device</summary>
            public ulong InitiatorID;
            /// <summary>Cartridge serial number</summary>
            public byte[] CartridgeSerialNumber;
        }

        public static Page_DF_Certance? DecodePage_DF_Certance(byte[] pageResponse)
        {
            if(pageResponse?[1] != 0xDF)
                return null;

            if(pageResponse[3] != 60)
                return null;

            if(pageResponse.Length != 64)
                return null;

            var decoded = new Page_DF_Certance
            {
                PeripheralQualifier  = (PeripheralQualifiers)((pageResponse[0] & 0xE0) >> 5),
                PeripheralDeviceType = (PeripheralDeviceTypes)(pageResponse[0] & 0x1F),
                PageLength           = (byte)(pageResponse[3] + 4),
                CmdFwd               = (byte)((pageResponse[5] & 0xC0) >> 5),
                Alerts               = (pageResponse[5]       & 0x20) == 0x20,
                NoRemov              = (pageResponse[5]       & 0x08) == 0x08,
                UnitRsvd             = (pageResponse[5]       & 0x04) == 0x04,
                Clean                = (pageResponse[5]       & 0x01) == 0x01,
                Threaded             = (pageResponse[6]       & 0x10) == 0x10,
                Lun1Cmd              = (pageResponse[6]       & 0x08) == 0x08,
                AutoloadMode         = (byte)(pageResponse[6] & 0x07), CartridgeType = pageResponse[8],
                CartridgeFormat      = pageResponse[9],
                CartridgeCapacity    = (ushort)((pageResponse[10] << 8) + pageResponse[11] + 4),
                PortATransportType   = pageResponse[12], PortASelectionID = pageResponse[15],
                OperatingHours = (uint)((pageResponse[20] << 24) + (pageResponse[21] << 16) + (pageResponse[22] << 8) +
                                        pageResponse[23]),
                CartridgeSerialNumber = new byte[32]
            };

            byte[] buf = new byte[8];
            Array.Copy(pageResponse, 24, buf, 0, 8);
            decoded.InitiatorID = BitConverter.ToUInt64(buf.Reverse().ToArray(), 0);
            Array.Copy(pageResponse, 32, decoded.CartridgeSerialNumber, 0, 32);

            return decoded;
        }

        public static string PrettifyPage_DF_Certance(byte[] pageResponse) =>
            PrettifyPage_DF_Certance(DecodePage_DF_Certance(pageResponse));

        public static string PrettifyPage_DF_Certance(Page_DF_Certance? modePage)
        {
            if(!modePage.HasValue)
                return null;

            Page_DF_Certance page = modePage.Value;
            var              sb   = new StringBuilder();

            sb.AppendLine("Certance drive status page:");

            switch(page.CmdFwd)
            {
                case 0:
                    sb.AppendLine("\tCommand forwarding is disabled");

                    break;
                case 1:
                    sb.AppendLine("\tCommand forwarding is enabled");

                    break;
                default:
                    sb.AppendFormat("\tUnknown command forwarding code {0}", page.CmdFwd).AppendLine();

                    break;
            }

            if(page.Alerts)
                sb.AppendLine("\tAlerts are enabled");

            if(page.NoRemov)
                sb.AppendLine("\tCartridge removable is prevented");

            if(page.UnitRsvd)
                sb.AppendFormat("\tUnit is reserved by initiator ID {0:X16}", page.InitiatorID).AppendLine();

            if(page.Clean)
                sb.AppendLine("\tDevice needs cleaning cartridge");

            if(page.Threaded)
                sb.AppendLine("\tCartridge tape is threaded");

            if(page.Lun1Cmd)
                sb.AppendLine("\tThere are commands pending to be forwarded");

            switch(page.AutoloadMode)
            {
                case 0:
                    sb.AppendLine("\tCartridge will be loaded and threaded on insertion");

                    break;
                case 1:
                    sb.AppendLine("\tCartridge will be loaded but not threaded on insertion");

                    break;
                case 2:
                    sb.AppendLine("\tCartridge will not be loaded");

                    break;
                default:
                    sb.AppendFormat("\tUnknown autoloading mode code {0}", page.AutoloadMode).AppendLine();

                    break;
            }

            switch(page.PortATransportType)
            {
                case 0:
                    sb.AppendLine("\tPort A link is down");

                    break;
                case 3:
                    sb.AppendLine("\tPort A uses Parallel SCSI Ultra-160 interface");

                    break;
                default:
                    sb.AppendFormat("\tUnknown port A transport type code {0}", page.PortATransportType).AppendLine();

                    break;
            }

            if(page.PortATransportType > 0)
                sb.AppendFormat("\tDrive responds to SCSI ID {0}", page.PortASelectionID).AppendLine();

            sb.AppendFormat("\tDrive has been operating {0}", TimeSpan.FromHours(page.OperatingHours)).AppendLine();

            if(page.CartridgeType > 0)
            {
                switch(page.CartridgeFormat)
                {
                    case 0:
                        sb.AppendLine("\tInserted cartridge is LTO");

                        break;
                    default:
                        sb.AppendFormat("\tUnknown cartridge format code {0}", page.CartridgeType).AppendLine();

                        break;
                }

                switch(page.CartridgeType)
                {
                    case 0:
                        sb.AppendLine("\tThere is no cartridge inserted");

                        break;
                    case 1:
                        sb.AppendLine("\tCleaning cartridge inserted");

                        break;
                    case 2:
                        sb.AppendLine("\tUnknown data cartridge inserted");

                        break;
                    case 3:
                        sb.AppendLine("\tFirmware cartridge inserted");

                        break;
                    case 4:
                        sb.AppendLine("\tLTO Ultrium 1 Type A cartridge inserted");

                        break;
                    case 5:
                        sb.AppendLine("\tLTO Ultrium 1 Type B cartridge inserted");

                        break;
                    case 6:
                        sb.AppendLine("\tLTO Ultrium 1 Type C cartridge inserted");

                        break;
                    case 7:
                        sb.AppendLine("\tLTO Ultrium 1 Type D cartridge inserted");

                        break;
                    case 8:
                        sb.AppendLine("\tLTO Ultrium 2 cartridge inserted");

                        break;
                    default:
                        sb.AppendFormat("\tUnknown cartridge type code {0}", page.CartridgeType).AppendLine();

                        break;
                }

                sb.AppendFormat("\tCartridge has an uncompressed capabity of {0} gigabytes", page.CartridgeCapacity).
                   AppendLine();

                sb.AppendFormat("\tCartridge serial number: {0}",
                                StringHandlers.SpacePaddedToString(page.CartridgeSerialNumber)).AppendLine();
            }
            else
                sb.AppendLine("\tThere is no cartridge inserted");

            return sb.ToString();
        }
        #endregion EVPD Page 0xDF (Certance): Drive status pages

        #region EVPD Page 0xC0 (IBM): Drive Component Revision Levels page
        /// <summary>Drive Component Revision Levels page Page code 0xC0 (IBM)</summary>
        public struct Page_C0_IBM
        {
            /// <summary>The peripheral qualifier.</summary>
            public PeripheralQualifiers PeripheralQualifier;
            /// <summary>The type of the peripheral device.</summary>
            public PeripheralDeviceTypes PeripheralDeviceType;
            /// <summary>The page code.</summary>
            public byte PageCode;
            /// <summary>The length of the page.</summary>
            public byte PageLength;
            public byte[] CodeName;
            public byte[] Date;
        }

        public static Page_C0_IBM? DecodePage_C0_IBM(byte[] pageResponse)
        {
            if(pageResponse?[1] != 0xC0)
                return null;

            if(pageResponse[3] != 39)
                return null;

            if(pageResponse.Length != 43)
                return null;

            var decoded = new Page_C0_IBM
            {
                PeripheralQualifier  = (PeripheralQualifiers)((pageResponse[0] & 0xE0) >> 5),
                PeripheralDeviceType = (PeripheralDeviceTypes)(pageResponse[0] & 0x1F),
                PageLength           = (byte)(pageResponse[3] + 4), CodeName = new byte[12], Date = new byte[8]
            };

            Array.Copy(pageResponse, 4, decoded.CodeName, 0, 12);
            Array.Copy(pageResponse, 23, decoded.Date, 0, 8);

            return decoded;
        }

        public static string PrettifyPage_C0_IBM(byte[] pageResponse) =>
            PrettifyPage_C0_IBM(DecodePage_C0_IBM(pageResponse));

        public static string PrettifyPage_C0_IBM(Page_C0_IBM? modePage)
        {
            if(!modePage.HasValue)
                return null;

            Page_C0_IBM page = modePage.Value;
            var         sb   = new StringBuilder();

            sb.AppendLine("IBM Drive Component Revision Levels page:");

            sb.AppendFormat("\tCode name: {0}", StringHandlers.CToString(page.CodeName)).AppendLine();
            sb.AppendFormat("\tDate: {0}", StringHandlers.CToString(page.Date)).AppendLine();

            return sb.ToString();
        }
        #endregion EVPD Page 0xC0 (IBM): Drive Component Revision Levels page

        #region EVPD Page 0xC1 (IBM): Drive Serial Numbers page
        /// <summary>Drive Serial Numbers page Page code 0xC1 (IBM)</summary>
        public struct Page_C1_IBM
        {
            /// <summary>The peripheral qualifier.</summary>
            public PeripheralQualifiers PeripheralQualifier;
            /// <summary>The type of the peripheral device.</summary>
            public PeripheralDeviceTypes PeripheralDeviceType;
            /// <summary>The page code.</summary>
            public byte PageCode;
            /// <summary>The length of the page.</summary>
            public byte PageLength;
            public byte[] ManufacturingSerial;
            public byte[] ReportedSerial;
        }

        public static Page_C1_IBM? DecodePage_C1_IBM(byte[] pageResponse)
        {
            if(pageResponse?[1] != 0xC1)
                return null;

            if(pageResponse[3] != 24)
                return null;

            if(pageResponse.Length != 28)
                return null;

            var decoded = new Page_C1_IBM
            {
                PeripheralQualifier  = (PeripheralQualifiers)((pageResponse[0] & 0xE0) >> 5),
                PeripheralDeviceType = (PeripheralDeviceTypes)(pageResponse[0] & 0x1F),
                PageLength           = (byte)(pageResponse[3] + 4), ManufacturingSerial = new byte[12],
                ReportedSerial       = new byte[12]
            };

            Array.Copy(pageResponse, 4, decoded.ManufacturingSerial, 0, 12);
            Array.Copy(pageResponse, 16, decoded.ReportedSerial, 0, 12);

            return decoded;
        }

        public static string PrettifyPage_C1_IBM(byte[] pageResponse) =>
            PrettifyPage_C1_IBM(DecodePage_C1_IBM(pageResponse));

        public static string PrettifyPage_C1_IBM(Page_C1_IBM? modePage)
        {
            if(!modePage.HasValue)
                return null;

            Page_C1_IBM page = modePage.Value;
            var         sb   = new StringBuilder();

            sb.AppendLine("IBM Drive Serial Numbers page:");

            sb.AppendFormat("\tManufacturing serial number: {0}", StringHandlers.CToString(page.ManufacturingSerial)).
               AppendLine();

            sb.AppendFormat("\tReported serial number: {0}", StringHandlers.CToString(page.ReportedSerial)).
               AppendLine();

            return sb.ToString();
        }
        #endregion EVPD Page 0xC1 (IBM): Drive Serial Numbers page

        #region EVPD Page 0xB0: Sequential-access device capabilities page
        /// <summary>Sequential-access device capabilities page Page code 0xB0</summary>
        public struct Page_B0
        {
            /// <summary>The peripheral qualifier.</summary>
            public PeripheralQualifiers PeripheralQualifier;
            /// <summary>The type of the peripheral device.</summary>
            public PeripheralDeviceTypes PeripheralDeviceType;
            /// <summary>The page code.</summary>
            public byte PageCode;
            /// <summary>The length of the page.</summary>
            public ushort PageLength;
            public bool TSMC;
            public bool WORM;
        }

        public static Page_B0? DecodePage_B0(byte[] pageResponse)
        {
            if(pageResponse?[1] != 0xB0)
                return null;

            if((pageResponse[2] << 8) + pageResponse[3] + 4 != pageResponse.Length)
                return null;

            if(pageResponse.Length < 5)
                return null;

            var decoded = new Page_B0
            {
                PeripheralQualifier  = (PeripheralQualifiers)((pageResponse[0] & 0xE0) >> 5),
                PeripheralDeviceType = (PeripheralDeviceTypes)(pageResponse[0] & 0x1F),
                PageLength           = (ushort)((pageResponse[2] << 8) + pageResponse[3] + 4),
                TSMC                 = (pageResponse[4] & 0x02) == 0x02, WORM = (pageResponse[4] & 0x01) == 0x01
            };

            return decoded;
        }

        public static string PrettifyPage_B0(byte[] pageResponse) => PrettifyPage_B0(DecodePage_B0(pageResponse));

        public static string PrettifyPage_B0(Page_B0? modePage)
        {
            if(!modePage.HasValue)
                return null;

            Page_B0 page = modePage.Value;
            var     sb   = new StringBuilder();

            sb.AppendLine("SCSI Sequential-access Device Capabilities:");

            if(page.WORM)
                sb.AppendLine("\tDevice supports WORM media");

            if(page.TSMC)
                sb.AppendLine("\tDevice supports Tape Stream Mirroring");

            return sb.ToString();
        }
        #endregion EVPD Page 0xB0: Sequential-access device capabilities page

        #region EVPD Pages 0xC0 to 0xC5 (HP): Drive component revision level pages
        /// <summary>Drive component revision level pages Page codes 0xC0 to 0xC5 (HP)</summary>
        public struct Page_C0_to_C5_HP
        {
            /// <summary>The peripheral qualifier.</summary>
            public PeripheralQualifiers PeripheralQualifier;
            /// <summary>The type of the peripheral device.</summary>
            public PeripheralDeviceTypes PeripheralDeviceType;
            /// <summary>The page code.</summary>
            public byte PageCode;
            /// <summary>The length of the page.</summary>
            public byte PageLength;
            public byte[] Component;
            public byte[] Version;
            public byte[] Date;
            public byte[] Variant;
            public byte[] Copyright;
        }

        public static Page_C0_to_C5_HP? DecodePage_C0_to_C5_HP(byte[] pageResponse)
        {
            if(pageResponse == null)
                return null;

            if(pageResponse[1] != 0xC0 &&
               pageResponse[1] != 0xC1 &&
               pageResponse[1] != 0xC2 &&
               pageResponse[1] != 0xC3 &&
               pageResponse[1] != 0xC4 &&
               pageResponse[1] != 0xC5)
                return null;

            if(pageResponse.Length < 4)
                return null;

            var decoded = new Page_C0_to_C5_HP
            {
                PeripheralQualifier  = (PeripheralQualifiers)((pageResponse[0] & 0xE0) >> 5),
                PeripheralDeviceType = (PeripheralDeviceTypes)(pageResponse[0] & 0x1F),
                PageLength           = (byte)(pageResponse[3] + 4), PageCode = pageResponse[1]
            };

            if(pageResponse[3]     == 92 &&
               pageResponse.Length >= 96)
            {
                decoded.Component = new byte[26];
                decoded.Version   = new byte[19];
                decoded.Date      = new byte[24];
                decoded.Variant   = new byte[23];

                Array.Copy(pageResponse, 4, decoded.Component, 0, 26);
                Array.Copy(pageResponse, 30, decoded.Version, 0, 19);
                Array.Copy(pageResponse, 49, decoded.Date, 0, 24);
                Array.Copy(pageResponse, 73, decoded.Variant, 0, 23);

                return decoded;
            }

            if(pageResponse[4] != pageResponse[3] - 1)
                return null;

            List<byte> array = new List<byte>();

            const string fwRegExStr =
                @"Firmware Rev\s+=\s+(?<fw>\d+\.\d+)\s+Build date\s+=\s+(?<date>(\w|\d|\s*.)*)\s*$";

            const string fwcRegExStr   = @"FW_CONF\s+=\s+(?<value>0x[0-9A-Fa-f]{8})\s*$";
            const string servoRegExStr = @"Servo\s+Rev\s+=\s+(?<version>\d+\.\d+)\s*$";
            var          fwRegEx       = new Regex(fwRegExStr);
            var          fwcRegEx      = new Regex(fwcRegExStr);
            var          servoRegEx    = new Regex(servoRegExStr);

            for(int pos = 5; pos < pageResponse.Length; pos++)
                if(pageResponse[pos] == 0x00)
                {
                    string str        = StringHandlers.CToString(array.ToArray());
                    Match  fwMatch    = fwRegEx.Match(str);
                    Match  fwcMatch   = fwcRegEx.Match(str);
                    Match  servoMatch = servoRegEx.Match(str);

                    if(str.ToLowerInvariant().StartsWith("copyright", StringComparison.Ordinal))
                        decoded.Copyright = Encoding.ASCII.GetBytes(str);
                    else if(fwMatch.Success)
                    {
                        decoded.Component = Encoding.ASCII.GetBytes("Firmware");
                        decoded.Version   = Encoding.ASCII.GetBytes(fwMatch.Groups["fw"].Value);
                        decoded.Date      = Encoding.ASCII.GetBytes(fwMatch.Groups["date"].Value);
                    }
                    else if(fwcMatch.Success)
                        decoded.Variant = Encoding.ASCII.GetBytes(fwMatch.Groups["value"].Value);
                    else if(servoMatch.Success)
                    {
                        decoded.Component = Encoding.ASCII.GetBytes("Servo");
                        decoded.Version   = Encoding.ASCII.GetBytes(servoMatch.Groups["version"].Value);
                    }

                    array = new List<byte>();
                }
                else
                    array.Add(pageResponse[pos]);

            return decoded;
        }

        public static string PrettifyPage_C0_to_C5_HP(byte[] pageResponse) =>
            PrettifyPage_C0_to_C5_HP(DecodePage_C0_to_C5_HP(pageResponse));

        public static string PrettifyPage_C0_to_C5_HP(Page_C0_to_C5_HP? modePage)
        {
            if(!modePage.HasValue)
                return null;

            Page_C0_to_C5_HP page = modePage.Value;
            var              sb   = new StringBuilder();

            switch(page.PageCode)
            {
                case 0xC0:
                    sb.AppendLine("HP Drive Firmware Revision Levels page:");

                    break;
                case 0xC1:
                    sb.AppendLine("HP Drive Hardware Revision Levels page:");

                    break;
                case 0xC2:
                    sb.AppendLine("HP Drive PCA Revision Levels page:");

                    break;
                case 0xC3:
                    sb.AppendLine("HP Drive Mechanism Revision Levels page:");

                    break;
                case 0xC4:
                    sb.AppendLine("HP Drive Head Assembly Revision Levels page:");

                    break;
                case 0xC5:
                    sb.AppendLine("HP Drive ACI Revision Levels page:");

                    break;
            }

            if(page.Component        != null &&
               page.Component.Length > 0)
                sb.AppendFormat("\tComponent: {0}", StringHandlers.CToString(page.Component)).AppendLine();

            if(page.Version        != null &&
               page.Version.Length > 0)
                sb.AppendFormat("\tVersion: {0}", StringHandlers.CToString(page.Version)).AppendLine();

            if(page.Date        != null &&
               page.Date.Length > 0)
                sb.AppendFormat("\tDate: {0}", StringHandlers.CToString(page.Date)).AppendLine();

            if(page.Variant        != null &&
               page.Variant.Length > 0)
                sb.AppendFormat("\tVariant: {0}", StringHandlers.CToString(page.Variant)).AppendLine();

            if(page.Copyright        != null &&
               page.Copyright.Length > 0)
                sb.AppendFormat("\tCopyright: {0}", StringHandlers.CToString(page.Copyright)).AppendLine();

            return sb.ToString();
        }
        #endregion EVPD Pages 0xC0 to 0xC5 (HP): Drive component revision level pages

        #region EVPD Page 0xC0 (Seagate): Firmware numbers page
        /// <summary>Firmware numbers page Page code 0xC0 (Seagate)</summary>
        public struct Page_C0_Seagate
        {
            /// <summary>The peripheral qualifier.</summary>
            public PeripheralQualifiers PeripheralQualifier;
            /// <summary>The type of the peripheral device.</summary>
            public PeripheralDeviceTypes PeripheralDeviceType;
            /// <summary>The page code.</summary>
            public byte PageCode;
            /// <summary>The length of the page.</summary>
            public byte PageLength;
            public byte[] ControllerFirmware;
            public byte[] BootFirmware;
            public byte[] ServoFirmware;
        }

        public static Page_C0_Seagate? DecodePage_C0_Seagate(byte[] pageResponse)
        {
            if(pageResponse?[1] != 0xC0)
                return null;

            if(pageResponse[3] != 12)
                return null;

            if(pageResponse.Length != 16)
                return null;

            var decoded = new Page_C0_Seagate
            {
                PeripheralQualifier  = (PeripheralQualifiers)((pageResponse[0] & 0xE0) >> 5),
                PeripheralDeviceType = (PeripheralDeviceTypes)(pageResponse[0] & 0x1F),
                PageLength           = (byte)(pageResponse[3] + 4), PageCode = pageResponse[1],
                ControllerFirmware   = new byte[4],
                BootFirmware         = new byte[4], ServoFirmware = new byte[4]
            };

            Array.Copy(pageResponse, 4, decoded.ControllerFirmware, 0, 4);
            Array.Copy(pageResponse, 8, decoded.BootFirmware, 0, 4);
            Array.Copy(pageResponse, 12, decoded.ServoFirmware, 0, 4);

            return decoded;
        }

        public static string PrettifyPage_C0_Seagate(byte[] pageResponse) =>
            PrettifyPage_C0_Seagate(DecodePage_C0_Seagate(pageResponse));

        public static string PrettifyPage_C0_Seagate(Page_C0_Seagate? modePage)
        {
            if(!modePage.HasValue)
                return null;

            Page_C0_Seagate page = modePage.Value;
            var             sb   = new StringBuilder();

            sb.AppendLine("Seagate Firmware Numbers page:");

            sb.AppendFormat("\tController firmware version: {0}", StringHandlers.CToString(page.ControllerFirmware)).
               AppendLine();

            sb.AppendFormat("\tBoot firmware version: {0}", StringHandlers.CToString(page.BootFirmware)).AppendLine();
            sb.AppendFormat("\tServo firmware version: {0}", StringHandlers.CToString(page.ServoFirmware)).AppendLine();

            return sb.ToString();
        }
        #endregion EVPD Page 0xC0 (Seagate): Firmware numbers page
    }
}