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> I was just looking at how to interface my ATA module with the CD ROM > commandset SCSI-MMC 4. Clearly you send information to the device using > the PACKET COMMANDSET. > > However, what concerns me is that there appears to be no way of indicating > which commandsets are supported by an ATAPI commandset. > > Is anyone aware of a method that a CD ROM drive can use to indicate its > support for SCSI standards. Known t10.org issue, off topic for t13.org. Contrast SPC with MMC re op x12 Inquiry at http://www.t10.org/scsi-3.htm SPC has a fix for this on paper, in byte 2. MMC broke that fix. SPC added a second fix for this on paper, out at the end of defined data. MMC still doesn't care. In real life, no op x12 Inquiry other than -i x24 -y "12 00:00:00 24 00" works, anyhow, because no other host is massively distributed. That limitation matters because that form of Inquiry defeats the SPC fix. Pat LaVarre
