Douglas Gilbert wrote:
The 16 byte CDB that Tejun is talking about is the
ATA PASS THROUGH (16) SCSI command. That is valid to
I'm talking about the changes to the implementation, which appear to
mistakenly allow 16-byte CDBs through to the ATAPI device, even if it
only supports 12-byte CDBs.
I am quite aware of the ATA passthru SCSI command. Heck, the spec had
input from me. I'm talking about something different.
The only clash between MMC and SATL SCSI opcodes is
with opcode 0xA1: BLANK in MMC and ATA PASS THROUGH (12)
Ok, so the answer is, yes there is a clash, and thus this change will
remove the ability for working-today setups to use BLANK.
In order to avoid breaking working setups, a method must be found which
tells the SATL to not filter out the ATA passthru commands.
This is all about being able to send ATA commands to
ATAPI devices that are valid for PACKET devices, examples:
IDENTIFY PACKET DEVICE
SET FEATURES
IDENTIFY DEVICE (should abort command + set signature)
DEVICE RESET
and I assume there are others.
I am quite aware of the purpose of ATA passthru :)
Jeff
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