SCSI Description
5–168 Quantum Atlas 10K II Ultra160/m SCSI Hard Disk Drives
REPORT DEVICE IDENTIFIER Command (A3h) (continued)
The REPORT DEVICE IDENTIFIER command’s parameter list contains a 4-byte
field that provides the length, in bytes, of the parameter list and the logical unit’s
identifier.
Bit
Byte
7 6 5 4 3 2 1 0
0 – 3
(MSB)
Identifier Length (n – 4)
(LSB)
4 – n Identifier
Figure 5–81 REPORT DEVICE IDENTIFIER Parameter List — Data Format
Table 5–80 REPORT DEVICE IDENTIFIER Parameter List — Field Descriptions
Field Description
Identifier Length This field specifies the length, in bytes, of the Identifier field. If
the Allocation Length field in the CDB is insufficient in size to
transfer all of the Identifier, the length is not adjusted to reflect
any truncation of information. The Identifier is initially set = 0,
and is changed only by a successful SET DEVICE IDENTIFIER
command.
Identifier The value reported in this field is a vendor-specific value and is
the last value written by a successful SET DEVICE IDENTIFIER
command. The value of the Identifier is changed only by a
successful SET DEVICE IDENTIFIER command. The Identifier value
persists through device resets, power cycles, and formatting of
media.
