Dell PowerVault ML6000 Dell PowerVault ML6000 SCSI Reference Guide - Page 80

Request Sense – 03h, What the Library Does With This Command, Command Usage

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Request Sense - 03h What the Library Does With This Command The library returns eighteen bytes of sense data to the requesting initiator. The data is preserved until either the REQUEST SENSE command or any other command is received. The library can queue multiple Unit Attentions for processing. Command Usage This command should be issued whenever the initiator receives a CHECK CONDITION from the library. It should continue to be issued until all check conditions have been cleared. Request Sense CDB Format The REQUEST SENSE CDB format is shown in the following table. Table 68 REQUEST SENSE CDB format Byte Bit 7 6 5 4 3 2 1 0 0 Op Code (03h) 1 Logical Unit Number Reserved 2 Reserved 3 Reserved 4 Allocation Length 5 Control Allocation Length - This field specifies the number of sense bytes requested by the initiator. 70 SCSI Commands

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70
SCSI Commands
Request Sense – 03h
What the Library Does With This Command
The library returns eighteen bytes of sense data to the requesting initiator. The data is preserved until either
the REQUEST SENSE command or any other command is received. The library can queue multiple Unit
Attentions for processing.
Command Usage
This command should be issued whenever the initiator receives a CHECK CONDITION from the library. It
should continue to be issued until all check conditions have been cleared.
Request Sense CDB Format
The REQUEST SENSE CDB format is shown in the following table.
Allocation Length
– This field specifies the number of sense bytes requested by the initiator.
Table 68
REQUEST SENSE CDB format
Bit
Byte
7
6
5
4
3
2
1
0
0
Op Code (03h)
1
Logical Unit Number
Reserved
2
Reserved
3
Reserved
4
Allocation Length
5
Control