3.1 Control/Sense Commands

The "Identifier Length" field specifies the length in bytes of the "Identifier" field.

If the "Allocation Length" field in the CDB is too small to transfer all of the identifier, the length shall not be adjusted to reflect the truncation. The identifier length shall initially equal zero, and shall be changed only by a successful SET DEVICE IDENTIFIER command.

The "Identifier" field shall contain a vendor specific value. The value reported shall be the last value written by a successful SET DEVICE IDENTIFIER command. The value of the identifier shall be changed only by a SET DEVICE IDENTIFIER command. The identifier value shall persist through resets, power cycles, media format operations, and media replacement.

The target shall return the same Identifier to all initiators on all ports.

The execution of a REPORT DEVICE IDENTIFIER may require the enabling of a nonvolatile memory within the logical unit. If the nonvolatile memory is not ready, the device server shall return CHECK CONDITION status, rather than wait for the device to become ready. The sense key shall be set to NOT READY and the additional sense data shall be set as described in the TEST UNIT READY command.

3.1.22SET DEVICE IDENTIFIER (A4)

Bit

7

6

5

 

4

 

3

 

2

1

0

Byte

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

X'A4'

 

 

 

 

 

 

 

 

 

 

 

 

1

0

0

0

 

 

 

Service Action (X’ 06’)

 

 

 

 

 

 

 

 

 

 

 

 

2

0

0

0

0

0

 

0

0

0

 

 

 

 

 

 

 

 

 

 

3

0

0

0

0

0

 

0

0

0

 

 

 

 

 

 

 

 

 

 

4

0

0

0

0

0

 

0

0

0

 

 

 

 

 

 

 

 

 

 

5

0

0

0

0

0

 

0

0

0

 

 

 

 

 

 

 

 

6

 

 

 

Allocation Length (MSB)

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

 

 

Allocation Length

 

 

 

 

 

 

 

 

 

 

 

 

8

 

 

 

 

Allocation Length

 

 

 

 

 

 

 

 

 

 

 

9

 

 

 

Allocation Length (LSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

10

0

0

0

0

0

 

0

0

0

 

 

 

 

 

 

 

 

 

 

11

0

0

0

0

0

 

0

0

Link

 

 

 

 

 

 

 

 

 

 

 

 

This command requests that the device identifier information in the logical unit be set to the value received in the SET DEVICE IDENTIFIER parameter list.

On successful completion of this command a unit attention shall be generated for all initiators except the one that issued the service action. When reporting the unit attention condition the additional sense code shall be set to DEVICE IDENTIFIER CHANGED.

The "Service Action" field can be specified only X'06'.

C141-E167

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Image 125
Fujitsu MAP3367, MAP3147, MAS3735, MAP3735, MAS3367 specifications SET Device Identifier A4

MAP3735, MAP3147, MAS3367, MAP3367, MAS3735 specifications

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