DeviceIOControl, vendor-specific SCSI command blocks

Well, I've come to poke Ex-Ex again over this question. I need to use windows to send a SCSI command to a usb device. I have a source for linux but have been told that without rewriting a driver I won't be able to do this. I don't think that's the case(although it very well may be).

I've also been told that I need to use  IOCTL_SCSI_PASS_THROUGH_DIRECT although I've gotten a ERROR_REVISION_MISMATCH error from DeviceIOControl.

Any ideas(I can provide the source for the linux version if need be)?
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Dagan HooverDeveloperAsked:
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That's not much detail...  But, I would suggest you try
Is this a mass storage device?   Is this vendor specific command related to mass storage (like a format or volume operation?)

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Dagan HooverDeveloperAuthor Commented:
Yes it is. To be exact it's a Sony PSP.

Here is a bit more detail.

When acting as a USB mass storage controller ("USB Connection" mode),
the PSP accepts a few vendor-specific SCSI command blocks.  This
program sends these commands via the Linux generic SCSI interface and
displays the results. To run, pass it the device node of your connected PSP.

I'm supposed to send a sg_io_hdr struct using the generic SCSI interface. I know of those constants for DeviceIOControl() but I don't know how to tie them into the sg_io_hdr_t  struct.

void do_command(int fd, char *desc, unsigned char *cmd, int len)
	sg_io_hdr_t io;
	unsigned char buf[512];
	memset(buf, 0, sizeof(buf));
	memset(&io, 0, sizeof(io));
	io.interface_id = 'S';
	io.cmd_len = len;
	io.mx_sb_len = 0;
	io.dxfer_direction = SG_DXFER_FROM_DEV;
	io.dxfer_len = sizeof(buf);
	io.dxferp = buf;
	io.cmdp = cmd;
	printf("Command: %s\n", desc);
	hexdump(cmd, len);
	if (ioctl(fd, SG_IO, &io) < 0) {
		printf("Error: %s\n", strerror(errno));
	if (( & SG_INFO_OK_MASK) != SG_INFO_OK) {
		printf("Failed with status 0x%02x\n", io.masked_status);
	len = io.dxfer_len - io.resid;
	printf("Response: %d %s\n", len, (len == 1) ? "byte" : "bytes");
	hexdump(buf, len);

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Dagan HooverDeveloperAuthor Commented:
After meddling and testing, to my surprise, it has worked. Code below.

Thanks for answering though, I've posted this question 2x before with no one knowing what to do.
  Buffer : PChar;
  BytesReturned : DWORD;
  PD := GetPD(GetPhysicalDiskNumber('H'));
    ShowMessage(Format('%d - 1',[GetLastError]));
  Buffer := AllocMem(512);
  BytesReturned := 0;
  srb.Length := sizeof(srb);
  srb.Lun := 2;
  srb.Cdb[0] := Byte(Commands[5].Cmd[1]);
  srb.Cdb[1] := Byte(Commands[5].Cmd[2]);
  srb.Cdb[2] := Byte(Commands[5].Cmd[3]);
  srb.Cdb[3] := Byte(Commands[5].Cmd[4]);
  srb.Cdb[4] := Byte(Commands[5].Cmd[5]);
  srb.Cdb[5] := Byte(Commands[5].Cmd[6]);
  srb.Cdb[6] := Byte(Commands[5].Cmd[7]);
  srb.Cdb[7] := Byte(Commands[5].Cmd[8]);
  srb.Cdb[8] := Byte(Commands[5].Cmd[9]);
  srb.Cdb[9] := Byte(Commands[5].Cmd[10]);
  srb.CdbLength := Commands[5].Len;
  srb.DataIn := 1;
  srb.TimeOutValue := 10;
  srb.DataBuffer := Buffer;
  srb.DataTransferLength := 512;
  If Not(DeviceIOControl(PD,IOCTL_SCSI_PASS_THROUGH_DIRECT,@srb,SizeOf(srb),@srb,SizeOf(srb),BytesReturned,nil)) Then
    ShowMessage(Format('%d - 2',[GetLastError]));
  Memo1.Text := HexDump(Buffer,512);

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