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 |