public SCSIStatusCodeName Write(SCSICommandDescriptorBlock command, LUNStructure lun, byte[] data, out byte[] response)
{
Disk disk = m_disks[lun];
if (disk.IsReadOnly)
{
Log(Severity.Verbose, "LUN {0}: Refused attempt to write to a read-only disk", lun);
SenseDataParameter senseData = SenseDataParameter.GetDataProtectSenseData();
response = senseData.GetBytes();
return(SCSIStatusCodeName.CheckCondition);
}
Log(Severity.Verbose, "LUN {0}: Writing {1} blocks starting from LBA {2}", (ushort)lun, command.TransferLength, (long)command.LogicalBlockAddress64);
try
{
disk.WriteSectors((long)command.LogicalBlockAddress64, data);
response = new byte[0];
return(SCSIStatusCodeName.Good);
}
catch (ArgumentOutOfRangeException)
{
Log(Severity.Error, "Write error: LBA out of range");
response = FormatSenseData(SenseDataParameter.GetIllegalRequestLBAOutOfRangeSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
catch (IOException ex)
{
Log(Severity.Error, "Write error: {0}", ex.ToString());
response = FormatSenseData(SenseDataParameter.GetMediumErrorWriteFaultSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
}
public SCSIStatusCodeName Read(SCSICommandDescriptorBlock command, LUNStructure lun, out byte[] response)
{
Disk disk = m_disks[lun];
int sectorCount = (int)command.TransferLength;
Log(Severity.Verbose, "LUN {0}: Reading {1} blocks starting from LBA {2}", (ushort)lun, sectorCount, (long)command.LogicalBlockAddress64);
try
{
response = disk.ReadSectors((long)command.LogicalBlockAddress64, sectorCount);
return(SCSIStatusCodeName.Good);
}
catch (ArgumentOutOfRangeException)
{
Log(Severity.Error, "Read error: LBA out of range");
response = FormatSenseData(SenseDataParameter.GetIllegalRequestLBAOutOfRangeSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
catch (CyclicRedundancyCheckException)
{
Log(Severity.Error, "Read error: CRC error");
response = FormatSenseData(SenseDataParameter.GetWriteFaultSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
catch (IOException ex)
{
Log(Severity.Error, "Read error: {0}", ex.ToString());
response = FormatSenseData(SenseDataParameter.GetMediumErrorUnrecoverableReadErrorSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
}
