Report Device Identifier (A3) - IBM Ultrastar 36LZX Specifications

8.26 REPORT DEVICE IDENTIFIER (A3)

Byte
7 6
0
1 Reserved = 0
2
3
4 (MSB)
5
6 (MSB)
|
9
10
11 VU = 0
Figure 136. REPORT DEVICE IDENTIFIER(A3)
The REPORT DEVICE IDENTIFIER command requests that the device server send device identification
information to the application client.
The LUN contains the logical unit number. If the requested logical unit has not been added to the target,
the command is terminated with a CHECK CONDITION status. The sense key is set to ILLEGAL
REQUEST, and the additional sense code set to LOGICAL UNIT NOT SUPPORTED.
The ALLOCATION LENGTH field indicates how much space has been reserved for the returned para-
meter data. If the length is not sufficient to contain all the parameter data, the first portion of the data is
returned. This is not considered an error. The actual length of the parameter data is available in the
IDENTIFIER LENGTH field in the parameter data. If the remainder of the parameter data is required, the
application client should send a new REPORT DEVICE IDENTIFIER command with an ALLOCATION
LENGTH field large enough to contain all the data.
The REPORT DEVICE IDENTIFIER parameter list contains a four-byte field that contains the length in
bytes of the parameter list and the logical unit's identifier.
Bit
5 4 3
Command Code = A3h
Service Action = 05h
Reserved = 0
Reserved = 0
LUN
Allocation Length
Reserved = 0
Reserved = 0
Ultrastar 36LZX hard disk drive specifications
2 1 0
(LSB)
(LSB)
FLAG LINK
160