Compare Command (39H); Copy Command (18H); Copy And Verify Command (3Ah) - Seagate SCSI Interface Product Manual

SCSI Interface Product Manual, Rev. J
It is permissible for a SCSI-2 device that has its definition changed to a SCSI-1 device to accept a Change Def-
inition command.
If the Change Definition command is not executed successfully for any reason, the operating definition shall
remain the same as it was before the Change Definition command was attempted.
After a power-on condition or a hard Reset condition, the drive shall set its initial operating definition to the last
saved value, if saving is implemented, or its default value, if saving is not implemented. Default is SCSI 2 mode.
5.2

Compare command (39h)

Not implemented. If received, a Check Condition status is sent.
5.3

Copy command (18h)

Not implemented. If received, the drive sends a Check Condition status and a Sense Key of Illegal Request.
5.4

Copy and Verify command (3Ah)

Not implemented. If received, a Check Condition status is sent.
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