SCSI Commands: 47BSET DEVICE IDENTIFIER
Page
209
3.35
SET DEVICE IDENTIFIER
The host uses this command to set the Device Identifier. The Device Identifier is
retrieved using the REPORT DEVICE IDENTIFIER command and shall persist
through power cycles. Upon successful completion of the SET DEVICE
IDENTIFIER command, a unit attention condition DEVICE IDENTIFIER CHANGED
is generated for all other initiators.
3.35.1
SET DEVICE IDENTIFIER Command Descriptor Block
The following table shows the layout of the CDB.
Byte
Bits
7 6 5 4 3 2 1 0
0
Operation Code (A4h)
1
Ignored LUN
Service Action (06h)
2
Reserved
3
Reserved
4
Restricted
5
Restricted
6
(MSB)
7
8
9
Parameter List Length
(LSB)
10
Reserved
11
Control
3.35.1.1
SET DEVICE IDENTIFIER Command Field Descriptions
Field Bytes
Bits
Description
Operation
Code
0
The Operation code for SET DEVICE IDENTIFIER is A4h.
Ignored
Logical Unit
1 5-7
The LUN field is vestigial from the SCSI-1 standard and is
ignored.
Service
Action
1 0-4
The Service Action field is 06h and identifies the function to be
performed under the more general command function
specified in the operation code.
Parameter
List Length
6-9 Specifies the amount of data to be sent, in bytes. The drive is
capable of accepting 64 bytes or less. A parameter list length
in excess of 64 bytes will result in a check condition.
Reserved
All reserved bits must be 0.
Control 11
See
SCSI Command Control Byte Format on page 25.
3.35.2
SET DEVICE IDENTIFIER Data
The following data is sent by the SET DEVICE IDENTIFIER command.
Byte
Bits
7 6 5 4 3 2 1 0
0
n
IDENTIFIER
Summary of Contents for LTO 4
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