Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
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19.30 REPORT DEVICE IDENTIFIER (A3/05)Table 211:REPORT DEVICE IDENTIFIER (A3/05)
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 parameter. This parameter is expected to be zero. Other value for this parameter
will cause the command to terminate with a CHECK CONDITION status. The sense key is set to ILLEGAL REQUEST, and
the additional sense code is set to INVALID FIELD IN CDB.
The ALLOCATION LENGTH field indicates how much space has been reserved for the returned parameter 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 4-byte field that contains the length in bytes of the parameter
list and the logical unit's identifier.
Byte Bit
76543210
0 Command Code = A3h
1 Reserved = 0 Service Action = 05h
2 Reserved = 0
3 Reserved = 0
4-5
(MSB)
LUN=0
(LSB)
6-9
(MSB)
Allocation Length
(LSB)
10 Reserved = 0
11 VU = 0 Reserved = 0 FLAG LINK