REQUEST SENSE Command (See ANSI SCSI-2 8.2.14)

The REQUEST SENSE command (Table 3.27) requests that the target transfer sense data to the initiator.

Table 3.27 REQUEST SENSE Command

 

 

 

 

 

 

 

 

 

 

 

 

 

INTERFACE

Bit

7

6

5

 

4

3

 

2

 

1

0

 

 

 

 

 

 

Byte

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

Operation Code (03h)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

Logical Unit Number

 

 

Reserved

 

 

 

 

2

 

 

 

 

Reserved

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

Reserved

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

Allocation Length

 

 

 

 

 

 

5

 

 

 

 

Control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The sense data:

1)shall be available if a contingent allegiance condition exists for the I_T_x nexus;

2)shall be available if other information is available in any field;

3)may be available if an unexpected disconnect occurred.

If the target has no other sense data available to return, it shall return a sense key of NO SENSE and an additional sense code of NO ADDITIONAL SENSE INFORMATION.

The sense data shall be preserved by the target for the initiator until retrieved by a REQUEST SENSE command or until the receipt of any other I/O process for the same I_T_x nexus. Sense data shall be cleared upon receipt of any subsequent I/O process (including REQUEST SENSE) to the same I_T_x nexus.

The sense data format for error code 70h(current errors) is supported.

M3099GX/GH OEM Manual

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