Unsupported SCSI Commands When Using SCSI Pass Through (123677)
The information in this article applies to:
- Microsoft Win32 Device Driver Kit (DDK) for Windows NT 3.5
- Microsoft Win32 Device Driver Kit (DDK) for Windows NT 3.51
- Microsoft Windows 2000 Driver Development Kit (DDK)
- Microsoft Windows XP Driver Development Kit (DDK)
This article was previously published under Q123677 SUMMARY
The following SCSI commands are unsupported when using SCSI pass through
and SCSI pass through direct:
SCSI Command Value DDK operation code
---------------------------------------------
COPY 0x18 SCSIOP_COPY
COMPARE 0x39 SCSIOP_COMPARE
COPY AND COMPARE 0x3A SCSIOP_COPY_COMPARE
NOTE: The COPY AND COMPARE command is referred to as the COPY AND VERIFY
command in the SCSI-2 specification.
If a SCSI pass through request is sent to the SCSI port driver with any one
of these unsupported operation codes, the request will be rejected with a
return status of STATUS_INVALID_DEVICE_REQUEST.
MORE INFORMATION
The described SCSI commands are identified as optional commands in the
SCSI-2 specification. This means that not all direct access devices will
support these commands. Some of these commands are also potentially
dangerous to implement, because large amounts of data may be easily
lost if they are used incorrectly.
Finally, implementation of these commands has security implications because
large amounts of data might be handled without operating system control.
For detailed descriptions of these commands, please see the SCSI-2
specification.
| Modification Type: | Minor | Last Reviewed: | 5/24/2004 |
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| Keywords: | KB123677 |
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