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Maxtor Atlas 10K V 5-111
5.30 REPORT DEVICE IDENTIFIER Command (A3h)
The REPORT DEVICE IDENTIFIER command requests that the device server
send device identification to the application client. The data format and field
descriptions are shown in Table 5-159 and Table 5-160 respectively.
Table 5-159 REPORT DEVICE IDENTIFIER Command Descriptor Block-Data Format
Table 5-160 REPORT DEVICE IDENTIFIER Command Descriptor Block-Field Descriptions
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. The data format and field descriptions are shown in Table 5-161 and Table
5-162 respectively.
Table 5-161 REPORT DEVICE IDENTIFIER Parameter List-Data Format
Table 5-162 REPORT DEVICE IDENTIFIER Parameter List-Field Descriptions
Bit
Byte
765 4 3210
0 Operation Code (A3h)
1 Reserved Service Action (05h)
2 – 5 Reserved
6 – 9
(MSB)
Allocation Length
(LSB)
10 Reserved
11 Control
Field Description
Service Action Must = 05h. Any other value forces Check Condition, Illegal Request.
Allocation Length
If the length is not sufficient to contain all of the parameter data, the first
portion of the data is returned, and this is not considered to be 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 must send a new REPORT DEVICE
IDENTIFIER command with an Allocation Length field large enough to
contain all of the data.
Bit
Byte
765 4 3210
0 – 3
(MSB)
Identifier Length (n – 4)
(LSB)
4 – n Identifier
Field Description
Identifier Length
This field specifies the length, in bytes, of the Identifier field. If the Al-
location 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 infor-
mation. The Identifier is initially set = 0, and is changed only by a suc-
cessful SET DEVICE IDENTIFIER command.