* DiscImageChef.Decoders/SCSI/Sense.cs:

Additional length may be bigger than provided buffer.

	* DiscImageChef/Commands/MediaInfo.cs:
	  Implement detection of medium not present and waiting for
	  drive to become ready.

DiscImageChef.Decoders/ChangeLog

@@ -1,3 +1,8 @@
+2015-12-04  Natalia Portillo  <claunia@claunia.com>
+
+	* SCSI/Sense.cs:
+	  Additional length may be bigger than provided buffer.
+
 2015-12-04  Natalia Portillo  <claunia@claunia.com>
 
 	* DVD/PFI.cs:

DiscImageChef.Decoders/SCSI/Sense.cs

@@ -304,9 +304,6 @@ namespace DiscImageChef.Decoders.SCSI
             decoded.Information = (uint)((sense[3] << 24) + (sense[4] << 16) + (sense[5] << 8) + sense[6]);
             decoded.AdditionalLength = sense[7];
 
-            if (sense.Length < decoded.AdditionalLength + 8)
-                return decoded;
-
             if(sense.Length >= 12)
                 decoded.CommandSpecific = (uint)((sense[8] << 24) + (sense[9] << 16) + (sense[10] << 8) + sense[11]);
 

DiscImageChef/ChangeLog

@@ -1,3 +1,9 @@
+2015-12-04  Natalia Portillo  <claunia@claunia.com>
+
+	* Commands/MediaInfo.cs:
+	  Implement detection of medium not present and waiting for
+	  drive to become ready.
+
 2015-12-04  Natalia Portillo  <claunia@claunia.com>
 
 	* Commands/MediaInfo.cs:

DiscImageChef/Commands/MediaInfo.cs

@@ -112,6 +112,51 @@ namespace DiscImageChef.Commands
             ulong blocks = 0;
             uint blockSize = 0;
 
+            sense = dev.ScsiTestUnitReady(out senseBuf, dev.Timeout, out duration);
+            if (sense)
+            {
+                Decoders.SCSI.FixedSense? decSense = Decoders.SCSI.Sense.DecodeFixed(senseBuf);
+                if (decSense.HasValue)
+                {
+                    if (decSense.Value.ASC == 0x3A)
+                    {
+                        DicConsole.ErrorWriteLine("Please insert media in drive");
+                        return;
+                    }
+
+                    if (decSense.Value.ASC == 0x04 && decSense.Value.ASCQ == 0x01)
+                    {
+                        int leftRetries = 10;
+                        while (leftRetries > 0)
+                        {
+                            DicConsole.WriteLine("\rWaiting for drive to become ready");
+                            System.Threading.Thread.Sleep(2000);
+                            sense = dev.ScsiTestUnitReady(out senseBuf, dev.Timeout, out duration);
+                            if (!sense)
+                                break;
+
+                            leftRetries--;
+                        }
+
+                        if (sense)
+                        {
+                            DicConsole.ErrorWriteLine("Error testing unit was ready:\n{0}", Decoders.SCSI.Sense.PrettifySense(senseBuf));
+                            return;
+                        }
+                    }
+                    else
+                    {
+                        DicConsole.ErrorWriteLine("Error testing unit was ready:\n{0}", Decoders.SCSI.Sense.PrettifySense(senseBuf));
+                        return;
+                    }
+                }
+                else
+                {
+                    DicConsole.ErrorWriteLine("Unknown testing unit was ready.");
+                    return;
+                }
+            }
+
             if (dev.SCSIType == DiscImageChef.Decoders.SCSI.PeripheralDeviceTypes.DirectAccess ||
                dev.SCSIType == DiscImageChef.Decoders.SCSI.PeripheralDeviceTypes.MultiMediaDevice ||
                dev.SCSIType == DiscImageChef.Decoders.SCSI.PeripheralDeviceTypes.OCRWDevice ||