Contradiction between MMC and Fuji on Inquiry command standard response
billmc37 at ctesc.net
Wed Apr 2 16:19:48 PDT 2008
* From the T10 Reflector (t10 at t10.org), posted by:
* Bill McFerrin <billmc37 at ctesc.net>
With respect to MMC-5, we are governed first by SPC-3. When MMC-5 does
not specify, SPC-3 rules. MMC-5 reports specific values and deviations
|from SPC-3. We reported Response Data Format = 11b is order to be
consistent with MtFuji. By specifying our difference with SPC-3, we are
In Inquiry data byte 3, NormACA is bit 5, HiSup is bit 4, and Response
Data Format is bit2 1 and 0. Maybe I do not understand, but I think
there is no problem.
David Burg wrote:
> Hi MMC and Fuji,
> Final MMC 5 says:
> *Table 320 INQUIRY Data for ATAPI and USB Drives*
> Response Data Format 0011b
> HiSup 0b
> NormACA 0b
> However, Mt Fuji 6 and 7 says:
> The ATAPI Transport Version field */shall /*contain 03h to comply with
> this version of the Specification. This field
> indicates the version of the ATAPI Transport that is being used. For
> more information on the transport, see the INCITS
> T13/1153D standard. For a SCSI logical unit this field is defined by
> the SCSI SPC-2 standard.
> A Response Data Format value of 02h indicates that the data */shall
> /*be in the format specified in this Specification.
> Response Data Format values less than two are obsolete. Response Data
> Format values greater than two are
> Note: A value of 3 for ATAPI Transport Version would match NormACA 1b
> and HiSup 1b. The response data format values contradict as well.
> Our Microsoft WLK test is currently verifying versus the MMC
> requirement above, thus the Fuji compliant devices get failed.
> Standard committees, which is the right specification here?
> Also, how does the host know if it should decode according to SCSI or
> according to ATAPI for the Fuji specification of inquiry response?
> With regards,
> David Burg.
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