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M2488 PRODUCT GUIDE TAPE UNIT SCSI COMMANDS
April 1997 CG00000-011503 REV. A 4-23
Table 4-20. Peripheral Qualifiers
QUALIFIER DESCRIPTION
0 0 0 b The peripheral device type in bits 0 through 4 is currently connected to this logical unit.
Note: This peripheral qualifier does not imply that the device is ready for access by the initiator.
0 0 1 b The target is capable of supporting the specified peripheral device type. However, the physical
device is not currently connected to this logical unit.
0 1 0 b Reserved
0 1 1 b The logical unit is not capable of supporting a physical device.
Note: For this peripheral qualifier, the peripheral device type is set to 1Fh, indicating unknown or
no device type.
1 X X b NOT USED
Table 4-21. Peripheral Device Type
CODE DESCRIPTION
01h
Sequential-access tape device.
Note: When the INQUIRY command is issued for the MTU LUN, the peripheral device type is set to
01h. This indicates a tape device.
08h
Medium changer device type.
1Fh
Unknown or no device type.
Note: This code is generated when the INQUIRY command is issued for a LUN which is neither the
MTU or Medium Changer.
Table 4-22. Possible Peripheral Qualifier and Device Types Generated
LUN
PERIPHERAL
QUALIFIER
PERIPHERAL
DEVICE TYPE
DESCRIPTION
MTU 000b 01h A sequential access device is currently connected to this
logical unit.
MC 000b 08h A medium changer device is currently connected to this log-
ical unit.
Unknown or not
connected
011b 1Fh An unknown or no device type is currently connected to this
logical unit.