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SCSI Description
5.40
SET DEVICE IDENTIFIER Command (A4h)
The SET DEVICE IDENTIFIER command requests that the device identifier
information in the logical unit be set to the value send via the SET DEVICE
IDENTIFIER command's parameter list. The data format and field descriptions are
shown in Table 5-196 and Table 5-197 respectively.
Upon successful completion of a SET DEVICE IDENTIFIER command, a Unit
Attention is generated for all initiators except the one that issued the command.
SET DEVICE IDENTIFIER Command Descriptor Block-Data Format
Table 5-196
Bit
7
Byte
0
1
2 – 5
(MSB)
6 – 9
10
11
SET DEVICE IDENTIFIER Command Descriptor Block-Field Descriptions
Table 5-197
Field
Service Action
Parameter List Length
The SET DEVICE IDENTIFIER command's parameter list contains Identifier to be
set by the logical unit to which the command is sent. The parameter list is shown
below in Table 5-198 and the field descriptions are shown in Table 5-199.
Table 5-198
Bit
Byte
(MSB)
0 – n
Table 5-199
Field
Identifier
5-140
Maxtor Atlas 15K
6
5
Reserved
Must = 06h. Any other value forces Check Condition, Illegal Request.
This field specifies the length, in bytes, of the Identifier to be transferred from the ap-
plication client to the device server. The maximum value for this field is 64 bytes. A
parameter list length of 0 indicates that no data will be transferred, and that subsequent
REPORT DEVICE IDENTIFIER commands will return an Identifier length of 0. If
the parameter list length exceeds 64 bytes, then the drive returns a Check Condition
status with the sense key set to Illegal Request, and an additional sense code of Invalid
Field in CDB.
SET DEVICE IDENTIFIER Parameter List-Data Format
7
6
5
SET DEVICE IDENTIFIER Parameter List-Field Descriptions
The value reported in this field is the data to be returned by all subsequent
REPORT DEVICE IDENTIFIER commands, until a new SET DEVICE
IDENTIFIER command is issued that changes the data.
4
3
2
Operation Code (A4h)
Service Action (06h)
Reserved
Parameter List Length
Reserved
Control
Description
4
3
Identifier
Description
1
0
(LSB)
2
1
0
(LSB)
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