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From: ted.lin on 23 May 2005 03:00
Dear all,

I use the SCSI command to read the CD-ROM.
The below is my code.

DiskDevice= CreateFile("\\\\.\\E", // file name
GENERIC_READ | GENERIC_WRITE , // access
mode
FILE_SHARE_READ |FILE_SHARE_WRITE, // share mode
NULL, // SD
OPEN_EXISTING, // how to
create
0, // file
attrib
NULL ); // handle to template
file

SRB_EXECSCSICMD srbExec;
memset ( &srbExec, 0, sizeof ( SRB_EXECSCSICMD ) );
srbExec.SRB_Cmd = SC_EXEC_SCSI_CMD;
srbExec.SRB_HaId = SCSI_HaId;
srbExec.SRB_Target = SCSI_TargetId;
srbExec.SRB_Lun = SCSI_Lun;
srbExec.SRB_Flags = SRB_DIR_IN;
srbExec.SRB_BufLen = len;
srbExec.SRB_BufPointer = pbtBuffer;
srbExec.SRB_SenseLen = SENSE_LEN;
srbExec.SRB_CDBLen = 12;
srbExec.CDBByte [ 0 ] = 0x28;
srbExec.CDBByte [ 2 ] = (addr>>24)&0xff;
srbExec.CDBByte [ 3 ] = (addr>>16)&0xff;
srbExec.CDBByte [ 4 ] = (addr>>8)&0xff;
srbExec.CDBByte [ 5 ] = addr&0xff;
srbExec.CDBByte [ 7 ] = (len>>8)&0xff;
srbExec.CDBByte [ 8 ] = len&0xff;


BOOL status;
SCSI_PASS_THROUGH_DIRECT_WITH_BUFFER swb;
ULONG length, returned;
ZeroMemory( &swb, sizeof(swb) );
swb.spt.Length = sizeof(SCSI_PASS_THROUGH);
swb.spt.CdbLength = lpsrb->SRB_CDBLen;
if ( lpsrb->SRB_Flags & SRB_DIR_IN )
swb.spt.DataIn = SCSI_IOCTL_DATA_IN;
else if ( lpsrb->SRB_Flags & SRB_DIR_OUT )
swb.spt.DataIn = SCSI_IOCTL_DATA_OUT;
else
swb.spt.DataIn = SCSI_IOCTL_DATA_UNSPECIFIED;
swb.spt.DataTransferLength = lpsrb->SRB_BufLen;
swb.spt.TimeOutValue = 1000;
swb.spt.DataBuffer = lpsrb->SRB_BufPointer;
swb.spt.SenseInfoOffset =
offsetof(SCSI_PASS_THROUGH_DIRECT_WITH_BUFFER,ucSenseBuf );
memcpy( swb.spt.Cdb, lpsrb->CDBByte, lpsrb->SRB_CDBLen );
length = sizeof(swb);

status = DeviceIoControl( DiskDevice,
IOCTL_SCSI_PASS_THROUGH_DIRECT,
&swb,
length,
&swb,
length,
&returned,
NULL );

if ( status )
{
lpsrb->SRB_Status = SS_COMP;
}

When I set the len = 1, the status is always ok.
other value the IOCTL will time out and cannot work well.
Would you lead me what happened in my code?
I see the READ(10) command. It show me the len is the trasfer length.
But I cannot write the right command.
Could you tell me where can I get the right method to call the READ(10)
command?
Thanks.

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