User's Manual

DLT4000 SCSI Interface
8-102 DLT4000/DLT4500/DLT4700 Cartridge Tape Subsystem
8.4.18 REQUEST SENSE (03h)
Bit
7 6 5 4 3 2 1 0
0 Operation Code (03h)
Logical Unit Number Reserved
Reserved
Byte Reserved
4
5 Unused Flag Link
8- REQUEST SENSE CDB
REQUEST SENSE tells the target to transfer sense data to the initiator.
The sense data is valid for a CHECK CONDITION or RESERVATION CONFLICT
target until retrieved by the REQUEST SENSE command, or until the receipt of any
other command from the same initiator.
the appropriate values in the EOM, Sense Key, Additional Sense Code, and
Additional Sense Code Qualifier. The positional information provided reflects the
(nondiagnostic) data still in its buffer as well as the data on tape.
REQUEST SENSE does not cause the drive to flush its buffered data to tape.
precede the REQUEST SENSE with a WRITE FILEMARKS with length 0 (Immed
=0) command, which forces the drive to flush any currently buffered data to tape. A
the drive to the initiator.
Allocation Length
The drive terminates the transfer when Allocation Length bytes have been transferred
or when all available sense data has been transferred to the host, whichever is less.