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Hale Landis wrote:
Addition of NCQ for ATAPI devices requires only the addition of a 'NCQ'
bit in the Features register as input to the PACKET command. This
doesn't sound like a big deal to me. Unless there is something hidden in
the SATA command protocols that prohibits ATAPI NCQ (and if so, how did
that happen?).
It's more than just that. Given that there is no READ FPDMA nor WRITE
FPDMA commands that are applicable to ATAPI, one would have to
contemplate use of a tagging system buried inside the command set [SCSI].
Jeff
