diff --git a/DiscImageChef.Decoders/ChangeLog b/DiscImageChef.Decoders/ChangeLog
index 065e485f8..a06dbe404 100644
--- a/DiscImageChef.Decoders/ChangeLog
+++ b/DiscImageChef.Decoders/ChangeLog
@@ -1,3 +1,16 @@
+2015-10-19  Natalia Portillo  <claunia@claunia.com>
+
+	* Floppy/ISO.cs:
+	* Floppy/Amiga.cs:
+	* Floppy/Enums.cs:
+	* Floppy/Apple2.cs:
+	* Floppy/System34.cs:
+	* Floppy/Commodore.cs:
+	* Floppy/AppleSony.cs:
+	* Floppy/System3740.cs:
+	* Floppy/Perpendicular.cs:
+	  Rename fields, methods and structs to more adequate names.
+
 2015-10-19  Natalia Portillo  <claunia@claunia.com>
 
 	* Floppy/ISO.cs:
diff --git a/DiscImageChef.Decoders/Floppy/Amiga.cs b/DiscImageChef.Decoders/Floppy/Amiga.cs
index 6f1bea831..ffc4ec82a 100644
--- a/DiscImageChef.Decoders/Floppy/Amiga.cs
+++ b/DiscImageChef.Decoders/Floppy/Amiga.cs
@@ -36,6 +36,7 @@
 // ****************************************************************************/
 // //$Id$
 using System;
+using System.Runtime.InteropServices;
 
 namespace DiscImageChef.Decoders.Floppy
 {
@@ -44,7 +45,7 @@ namespace DiscImageChef.Decoders.Floppy
     /// </summary>
     public static class Amiga
     {
-        public struct CommodoreAmigaSector
+        public struct Sector
         {
             /// <summary>
             /// Set to 0x00
diff --git a/DiscImageChef.Decoders/Floppy/Apple2.cs b/DiscImageChef.Decoders/Floppy/Apple2.cs
index 7147b5dc3..e80f51dcd 100644
--- a/DiscImageChef.Decoders/Floppy/Apple2.cs
+++ b/DiscImageChef.Decoders/Floppy/Apple2.cs
@@ -36,6 +36,7 @@
 // ****************************************************************************/
 // //$Id$
 using System;
+using System.Runtime.InteropServices;
 
 namespace DiscImageChef.Decoders.Floppy
 {
@@ -47,24 +48,24 @@ namespace DiscImageChef.Decoders.Floppy
         /// <summary>
         /// GCR-encoded Apple ][ GCR floppy track
         /// </summary>
-        public struct AppleOldGCRRawSectorRawTrack
+        public struct RawTrack
         {
             /// <summary>
             /// Track preamble, set to self-sync 0xFF, between 40 and 95 bytes
             /// </summary>
             public byte[] gap;
-            public AppleOldGCRRawSector[] sectors;
+            public RawSector[] sectors;
         }
 
         /// <summary>
         /// GCR-encoded Apple ][ GCR floppy sector
         /// </summary>
-        public struct AppleOldGCRRawSector
+        public struct RawSector
         {
             /// <summary>
             /// Address field
             /// </summary>
-            public AppleOldGCRRawAddressField addressField;
+            public RawDataField addressField;
             /// <summary>
             /// Track preamble, set to self-sync 0xFF, between 5 and 10 bytes
             /// </summary>
@@ -72,7 +73,7 @@ namespace DiscImageChef.Decoders.Floppy
             /// <summary>
             /// Data field
             /// </summary>
-            public AppleOldGCRRawDataField dataField;
+            public RawDataField dataField;
             /// <summary>
             /// Track preamble, set to self-sync 0xFF, between 14 and 24 bytes
             /// </summary>
@@ -82,7 +83,7 @@ namespace DiscImageChef.Decoders.Floppy
         /// <summary>
         /// GCR-encoded Apple ][ GCR floppy sector address field
         /// </summary>
-        public struct AppleOldGCRRawAddressField
+        public struct RawAddressField
         {
             /// <summary>
             /// Always 0xD5, 0xAA, 0x96
@@ -127,7 +128,7 @@ namespace DiscImageChef.Decoders.Floppy
         /// <summary>
         /// GCR-encoded Apple ][ GCR floppy sector data field
         /// </summary>
-        public struct AppleOldGCRRawDataField
+        public struct RawDataField
         {
             /// <summary>
             /// Always 0xD5, 0xAA, 0xAD
diff --git a/DiscImageChef.Decoders/Floppy/AppleSony.cs b/DiscImageChef.Decoders/Floppy/AppleSony.cs
index 1a904bce7..723152d52 100644
--- a/DiscImageChef.Decoders/Floppy/AppleSony.cs
+++ b/DiscImageChef.Decoders/Floppy/AppleSony.cs
@@ -36,6 +36,7 @@
 // ****************************************************************************/
 // //$Id$
 using System;
+using System.Runtime.InteropServices;
 
 namespace DiscImageChef.Decoders.Floppy
 {
@@ -50,24 +51,24 @@ namespace DiscImageChef.Decoders.Floppy
         /// <summary>
         /// GCR-encoded Apple Sony GCR floppy track
         /// </summary>
-        public struct AppleSonyGCRRawSectorRawTrack
+        public struct RawTrack
         {
             /// <summary>
             /// Track preamble, set to self-sync 0xFF, 36 bytes
             /// </summary>
             public byte[] gap;
-            public AppleSonyGCRRawSector[] sectors;
+            public RawSector[] sectors;
         }
 
         /// <summary>
         /// GCR-encoded Apple Sony GCR floppy sector
         /// </summary>
-        public struct AppleSonyGCRRawSector
+        public struct RawSector
         {
             /// <summary>
             /// Address field
             /// </summary>
-            public AppleSonyGCRRawAddressField addressField;
+            public RawAddressField addressField;
             /// <summary>
             /// Track preamble, set to self-sync 0xFF, 6 bytes
             /// </summary>
@@ -75,7 +76,7 @@ namespace DiscImageChef.Decoders.Floppy
             /// <summary>
             /// Data field
             /// </summary>
-            public AppleSonyGCRRawDataField dataField;
+            public RawDataField dataField;
             /// <summary>
             /// Track preamble, set to self-sync 0xFF, unknown size
             /// </summary>
@@ -85,7 +86,7 @@ namespace DiscImageChef.Decoders.Floppy
         /// <summary>
         /// GCR-encoded Apple Sony GCR floppy sector address field
         /// </summary>
-        public struct AppleSonyGCRRawAddressField
+        public struct RawAddressField
         {
             /// <summary>
             /// Always 0xD5, 0xAA, 0x96
@@ -122,7 +123,7 @@ namespace DiscImageChef.Decoders.Floppy
         /// <summary>
         /// GCR-encoded Apple ][ GCR floppy sector data field
         /// </summary>
-        public struct AppleSonyGCRRawDataField
+        public struct RawDataField
         {
             /// <summary>
             /// Always 0xD5, 0xAA, 0xAD
@@ -130,7 +131,7 @@ namespace DiscImageChef.Decoders.Floppy
             [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
             public byte[] prologue;
             /// <summary>
-            /// Spare, usually <see cref="AppleSonyGCRRawAddressField.sector"/> 
+            /// Spare, usually <see cref="RawAddressField.sector"/> 
             /// </summary>
             public byte spare;
             /// <summary>
diff --git a/DiscImageChef.Decoders/Floppy/Commodore.cs b/DiscImageChef.Decoders/Floppy/Commodore.cs
index 7de147064..27f320e00 100644
--- a/DiscImageChef.Decoders/Floppy/Commodore.cs
+++ b/DiscImageChef.Decoders/Floppy/Commodore.cs
@@ -36,6 +36,7 @@
 // ****************************************************************************/
 // //$Id$
 using System;
+using System.Runtime.InteropServices;
 
 namespace DiscImageChef.Decoders.Floppy
 {
@@ -47,7 +48,7 @@ namespace DiscImageChef.Decoders.Floppy
         /// <summary>
         /// Decoded Commodore GCR sector header
         /// </summary>
-        public struct CommodoreSectorHeader
+        public struct SectorHeader
         {
             /// <summary>
             /// Always 0x08
@@ -78,7 +79,7 @@ namespace DiscImageChef.Decoders.Floppy
         /// <summary>
         /// Decoded Commodore GCR sector data
         /// </summary>
-        public struct CommodoreSectorData
+        public struct SectorData
         {
             /// <summary>
             /// Always 0x07
diff --git a/DiscImageChef.Decoders/Floppy/Enums.cs b/DiscImageChef.Decoders/Floppy/Enums.cs
index d909338f9..baa1d6746 100644
--- a/DiscImageChef.Decoders/Floppy/Enums.cs
+++ b/DiscImageChef.Decoders/Floppy/Enums.cs
@@ -39,8 +39,6 @@ using System;
 
 namespace DiscImageChef.Decoders.Floppy
 {
-    #region Public enumerations
-
     /// <summary>
     /// In-sector code for sector size
     /// </summary>
@@ -107,7 +105,5 @@ namespace DiscImageChef.Decoders.Floppy
         /// </summary>
         MacDoubleSide = 0xD9
     }
-
-    #endregion Public enumerations
 }
 
diff --git a/DiscImageChef.Decoders/Floppy/ISO.cs b/DiscImageChef.Decoders/Floppy/ISO.cs
index f3a57b314..2d7492bbe 100644
--- a/DiscImageChef.Decoders/Floppy/ISO.cs
+++ b/DiscImageChef.Decoders/Floppy/ISO.cs
@@ -37,6 +37,7 @@
 // ****************************************************************************/
 // //$Id$
 using System;
+using System.Runtime.InteropServices;
 
 namespace DiscImageChef.Decoders.Floppy
 {
@@ -58,7 +59,7 @@ namespace DiscImageChef.Decoders.Floppy
         /// <summary>
         /// ISO floppy track, also used by Atari ST and others
         /// </summary>
-        public struct ISOFloppyTrack
+        public struct Track
         {
             /// <summary>
             /// Start of track, 32 bytes set to 0x4E
@@ -68,12 +69,106 @@ namespace DiscImageChef.Decoders.Floppy
             /// <summary>
             /// Track sectors
             /// </summary>
-            public IBMMFMSector[] sectors;
+            public Sector[] sectors;
             /// <summary>
             /// Undefined size
             /// </summary>
             public byte[] gap;
         }
+
+        /// <summary>
+        /// Raw demodulated format for IBM System 34 floppies
+        /// </summary>
+        public struct Sector
+        {
+            /// <summary>
+            /// Sector address mark
+            /// </summary>
+            public AddressMark addressMark;
+            /// <summary>
+            /// 22 bytes set to 0x4E, set to 0x22 on Commodore 1581
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 22)]
+            public byte[] innerGap;
+            /// <summary>
+            /// Sector data block
+            /// </summary>
+            public DataBlock dataBlock;
+            /// <summary>
+            /// Variable bytes set to 0x4E, ECMA defines 54
+            /// </summary>
+            public byte[] outerGap;
+        }
+
+        /// <summary>
+        /// Sector address mark for IBM System 34 floppies, contains sync word
+        /// </summary>
+        public struct AddressMark
+        {
+            /// <summary>
+            /// 12 bytes set to 0
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)]
+            public byte[] zero;
+            /// <summary>
+            /// 3 bytes set to 0xA1
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
+            public byte[] aone;
+            /// <summary>
+            /// Set to <see cref="IBMIdType.AddressMark"/>
+            /// </summary>
+            public IBMIdType type;
+            /// <summary>
+            /// Track number
+            /// </summary>
+            public byte track;
+            /// <summary>
+            /// Side number
+            /// </summary>
+            public byte side;
+            /// <summary>
+            /// Sector number
+            /// </summary>
+            public byte sector;
+            /// <summary>
+            /// <see cref="IBMSectorSizeCode"/> 
+            /// </summary>
+            public IBMSectorSizeCode sectorSize;
+            /// <summary>
+            /// CRC16 from <see cref="AddressMark.aone"/> to end of <see cref="sectorSize"/> 
+            /// </summary>
+            public UInt16 crc;
+        }
+
+        /// <summary>
+        /// Sector data block for IBM System 34 floppies
+        /// </summary>
+        public struct DataBlock
+        {
+            /// <summary>
+            /// 12 bytes set to 0
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)]
+            public byte[] zero;
+            /// <summary>
+            /// 3 bytes set to 0xA1
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
+            public byte[] aone;
+            /// <summary>
+            /// Set to <see cref="IBMIdType.DataMark"/> or to <see cref="IBMIdType.DeletedDataMark"/>
+            /// </summary>
+            public IBMIdType type;
+            /// <summary>
+            /// User data
+            /// </summary>
+            public byte[] data;
+            /// <summary>
+            /// CRC16 from <see cref="aone"/> to end of <see cref="data"/> 
+            /// </summary>
+            public UInt16 crc;
+        }
     }
 }
 
diff --git a/DiscImageChef.Decoders/Floppy/Perpendicular.cs b/DiscImageChef.Decoders/Floppy/Perpendicular.cs
index 6a0d13b36..55e7c929e 100644
--- a/DiscImageChef.Decoders/Floppy/Perpendicular.cs
+++ b/DiscImageChef.Decoders/Floppy/Perpendicular.cs
@@ -36,6 +36,7 @@
 // ****************************************************************************/
 // //$Id$
 using System;
+using System.Runtime.InteropServices;
 
 namespace DiscImageChef.Decoders.Floppy
 {
@@ -57,16 +58,16 @@ namespace DiscImageChef.Decoders.Floppy
         /// <summary>
         /// Perpendicular floppy track
         /// </summary>
-        public struct PerpendicularFloppyTrack
+        public struct Track
         {
             /// <summary>
             /// Start of track
             /// </summary>
-            public IBMMFMTrackPreamble trackStart;
+            public TrackPreamble trackStart;
             /// <summary>
             /// Track sectors
             /// </summary>
-            public PerpendicularFloppySector[] sectors;
+            public Sector[] sectors;
             /// <summary>
             /// Undefined size
             /// </summary>
@@ -76,12 +77,12 @@ namespace DiscImageChef.Decoders.Floppy
         /// <summary>
         /// Raw demodulated format for perpendicular floppies
         /// </summary>
-        public struct PerpendicularFloppySector
+        public struct Sector
         {
             /// <summary>
             /// Sector address mark
             /// </summary>
-            public IBMMFMSectorAddressMark addressMark;
+            public AddressMark addressMark;
             /// <summary>
             /// 41 bytes set to 0x4E
             /// </summary>
@@ -90,12 +91,114 @@ namespace DiscImageChef.Decoders.Floppy
             /// <summary>
             /// Sector data block
             /// </summary>
-            public IBMMFMSectorDataBlock dataBlock;
+            public DataBlock dataBlock;
             /// <summary>
             /// Variable-sized inter-sector gap, ECMA defines 83 bytes
             /// </summary>
             public byte[] outerGap;
         }
+
+        /// <summary>
+        /// Start of IBM PC MFM floppy track
+        /// Used by IBM PC, Apple Macintosh (high-density only), and a lot others
+        /// </summary>
+        public struct TrackPreamble
+        {
+            /// <summary>
+            /// Gap from index pulse, 80 bytes set to 0x4E
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 80)]
+            public byte[] gap;
+            /// <summary>
+            /// 12 bytes set to 0x00
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)]
+            public byte[] zero;
+            /// <summary>
+            /// 3 bytes set to 0xC2
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
+            public byte[] ctwo;
+            /// <summary>
+            /// Set to <see cref="IBMIdType.IndexMark"/> 
+            /// </summary>
+            public IBMIdType type;
+            /// <summary>
+            /// Gap until first sector, 50 bytes to 0x4E
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 50)]
+            public byte[] gap1;
+        }
+
+        /// <summary>
+        /// Sector address mark for IBM System 34 floppies, contains sync word
+        /// </summary>
+        public struct AddressMark
+        {
+            /// <summary>
+            /// 12 bytes set to 0
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)]
+            public byte[] zero;
+            /// <summary>
+            /// 3 bytes set to 0xA1
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
+            public byte[] aone;
+            /// <summary>
+            /// Set to <see cref="IBMIdType.AddressMark"/>
+            /// </summary>
+            public IBMIdType type;
+            /// <summary>
+            /// Track number
+            /// </summary>
+            public byte track;
+            /// <summary>
+            /// Side number
+            /// </summary>
+            public byte side;
+            /// <summary>
+            /// Sector number
+            /// </summary>
+            public byte sector;
+            /// <summary>
+            /// <see cref="IBMSectorSizeCode"/> 
+            /// </summary>
+            public IBMSectorSizeCode sectorSize;
+            /// <summary>
+            /// CRC16 from <see cref="AddressMark.aone"/> to end of <see cref="sectorSize"/> 
+            /// </summary>
+            public UInt16 crc;
+        }
+
+        /// <summary>
+        /// Sector data block for IBM System 34 floppies
+        /// </summary>
+        public struct DataBlock
+        {
+            /// <summary>
+            /// 12 bytes set to 0
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)]
+            public byte[] zero;
+            /// <summary>
+            /// 3 bytes set to 0xA1
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
+            public byte[] aone;
+            /// <summary>
+            /// Set to <see cref="IBMIdType.DataMark"/> or to <see cref="IBMIdType.DeletedDataMark"/>
+            /// </summary>
+            public IBMIdType type;
+            /// <summary>
+            /// User data
+            /// </summary>
+            public byte[] data;
+            /// <summary>
+            /// CRC16 from <see cref="aone"/> to end of <see cref="data"/> 
+            /// </summary>
+            public UInt16 crc;
+        }
     }
 }
 
diff --git a/DiscImageChef.Decoders/Floppy/System34.cs b/DiscImageChef.Decoders/Floppy/System34.cs
index 3b58be02c..0debf6bc5 100644
--- a/DiscImageChef.Decoders/Floppy/System34.cs
+++ b/DiscImageChef.Decoders/Floppy/System34.cs
@@ -36,6 +36,7 @@
 // ****************************************************************************/
 // //$Id$
 using System;
+using System.Runtime.InteropServices;
 
 namespace DiscImageChef.Decoders.Floppy
 {
@@ -58,16 +59,16 @@ namespace DiscImageChef.Decoders.Floppy
         /// Track format for IBM System 34 floppy
         /// Used by IBM PC, Apple Macintosh (high-density only), and a lot others
         /// </summary>
-        public struct IBMMFMTrack
+        public struct Track
         {
             /// <summary>
             /// Start of track
             /// </summary>
-            public IBMMFMTrackPreamble trackStart;
+            public TrackPreamble trackStart;
             /// <summary>
             /// Track sectors
             /// </summary>
-            public IBMMFMSector[] sectors;
+            public Sector[] sectors;
             /// <summary>
             /// Undefined size
             /// </summary>
@@ -78,7 +79,7 @@ namespace DiscImageChef.Decoders.Floppy
         /// Start of IBM PC MFM floppy track
         /// Used by IBM PC, Apple Macintosh (high-density only), and a lot others
         /// </summary>
-        public struct IBMMFMTrackPreamble
+        public struct TrackPreamble
         {
             /// <summary>
             /// Gap from index pulse, 80 bytes set to 0x4E
@@ -109,12 +110,12 @@ namespace DiscImageChef.Decoders.Floppy
         /// <summary>
         /// Raw demodulated format for IBM System 34 floppies
         /// </summary>
-        public struct IBMMFMSector
+        public struct Sector
         {
             /// <summary>
             /// Sector address mark
             /// </summary>
-            public IBMMFMSectorAddressMark addressMark;
+            public AddressMark addressMark;
             /// <summary>
             /// 22 bytes set to 0x4E, set to 0x22 on Commodore 1581
             /// </summary>
@@ -123,7 +124,7 @@ namespace DiscImageChef.Decoders.Floppy
             /// <summary>
             /// Sector data block
             /// </summary>
-            public IBMMFMSectorAddressMark dataBlock;
+            public DataBlock dataBlock;
             /// <summary>
             /// Variable bytes set to 0x4E, ECMA defines 54
             /// </summary>
@@ -133,7 +134,7 @@ namespace DiscImageChef.Decoders.Floppy
         /// <summary>
         /// Sector address mark for IBM System 34 floppies, contains sync word
         /// </summary>
-        public struct IBMMFMSectorAddressMark
+        public struct AddressMark
         {
             /// <summary>
             /// 12 bytes set to 0
@@ -166,7 +167,7 @@ namespace DiscImageChef.Decoders.Floppy
             /// </summary>
             public IBMSectorSizeCode sectorSize;
             /// <summary>
-            /// CRC16 from <see cref="IBMMFMSectorAddressMark.aone"/> to end of <see cref="sectorSize"/> 
+            /// CRC16 from <see cref="AddressMark.aone"/> to end of <see cref="sectorSize"/> 
             /// </summary>
             public UInt16 crc;
         }
@@ -174,7 +175,7 @@ namespace DiscImageChef.Decoders.Floppy
         /// <summary>
         /// Sector data block for IBM System 34 floppies
         /// </summary>
-        public struct IBMMFMSectorDataBlock
+        public struct DataBlock
         {
             /// <summary>
             /// 12 bytes set to 0
diff --git a/DiscImageChef.Decoders/Floppy/System3740.cs b/DiscImageChef.Decoders/Floppy/System3740.cs
index 4815c811e..465dd1d54 100644
--- a/DiscImageChef.Decoders/Floppy/System3740.cs
+++ b/DiscImageChef.Decoders/Floppy/System3740.cs
@@ -36,6 +36,7 @@
 // ****************************************************************************/
 // //$Id$
 using System;
+using System.Runtime.InteropServices;
 
 namespace DiscImageChef.Decoders.Floppy
 {
@@ -57,16 +58,16 @@ namespace DiscImageChef.Decoders.Floppy
         /// <summary>
         /// Track format for IBM System 3740 floppy
         /// </summary>
-        public struct IBMFMTrack
+        public struct Track
         {
             /// <summary>
             /// Start of track
             /// </summary>
-            public IBMFMTrackPreamble trackStart;
+            public TrackPreamble trackStart;
             /// <summary>
             /// Track sectors
             /// </summary>
-            public IBMFMSector[] sectors;
+            public Sector[] sectors;
             /// <summary>
             /// Undefined size
             /// </summary>
@@ -76,7 +77,7 @@ namespace DiscImageChef.Decoders.Floppy
         /// <summary>
         /// Start of IBM PC FM floppy track
         /// </summary>
-        public struct IBMFMTrackPreamble
+        public struct TrackPreamble
         {
             /// <summary>
             /// Gap from index pulse, 80 bytes set to 0xFF
@@ -102,12 +103,12 @@ namespace DiscImageChef.Decoders.Floppy
         /// <summary>
         /// Raw demodulated format for IBM System 3740 floppies
         /// </summary>
-        public struct IBMFMSector
+        public struct Sector
         {
             /// <summary>
             /// Sector address mark
             /// </summary>
-            public IBMFMSectorAddressMark addressMark;
+            public AddressMark addressMark;
             /// <summary>
             /// 11 bytes set to 0xFF
             /// </summary>
@@ -116,7 +117,7 @@ namespace DiscImageChef.Decoders.Floppy
             /// <summary>
             /// Sector data block
             /// </summary>
-            public IBMFMSectorAddressMark dataBlock;
+            public DataBlock dataBlock;
             /// <summary>
             /// Variable bytes set to 0xFF
             /// </summary>
@@ -126,7 +127,7 @@ namespace DiscImageChef.Decoders.Floppy
         /// <summary>
         /// Sector address mark for IBM System 3740 floppies, contains sync word
         /// </summary>
-        public struct IBMFMSectorAddressMark
+        public struct AddressMark
         {
             /// <summary>
             /// 6 bytes set to 0
@@ -162,7 +163,7 @@ namespace DiscImageChef.Decoders.Floppy
         /// <summary>
         /// Sector data block for IBM System 3740 floppies
         /// </summary>
-        public struct IBMFMSectorDataBlock
+        public struct DataBlock
         {
             /// <summary>
             /// 12 bytes set to 0