Quantum sdlt 220 Guía Del Usuario
SDLT 220 and SDLT 320 Product Manual
CHAPTER 6: SCSI Description
81-85002-01
March 2004
6-5
6.3
SCSI-3 Commands
ANSI classifies SCSI commands as mandatory, optional, or vendor-specific.
The mandatory and optional SCSI-3 commands implemented for the drives are
summarized in
The mandatory and optional SCSI-3 commands implemented for the drives are
summarized in
Table 6-2.
Implemented ANSI SCSI-3 Commands
Command
Code
Class
Description
PERSISTENT RESERVE
IN
IN
5Eh
Optional
Used to retrieve from the drive information
about persistent reservations and registrations.
about persistent reservations and registrations.
PERSISTENT RESERVE
OUT
OUT
5Fh
Optional
Used to register and reserve the drive through
resets and power cycles.
resets and power cycles.
RELEASE (10)
57h
Mandatory
Used to release a previously reserved unit.
REPORT DENSITY
SUPPORT
SUPPORT
44h
Mandatory
Requests the drive report the density codes and
some identifying information for all supported
medium formats.
some identifying information for all supported
medium formats.
REPORT DEVICE
IDENTIFIER
IDENTIFIER
A3h
Optional
Used to retrieve the information saved in the
drive by a SET DEVICE IDENTIFIER
command.
drive by a SET DEVICE IDENTIFIER
command.
REPORT LUNS
A0h
Mandatory
Requests the drive return a list of supported
logical units.
logical units.
RESERVE (10)
56h
Mandatory
Used to reserve a logical unit.
SET DEVICE
IDENTIFIER
IDENTIFIER
A4h
Optional
Used to save device identifying data in the
drive.
drive.