User's Guide

Chapter 2 Emulated Medium Changer SCSI Commands
Request Sense (03h)
Quantum DX-Series Software Interface Guide 75
Request Sense (03h) 2
The Request Sense command allows the host to receive sense data from
the DX-Series system.
The DX-Series system supports reporting of current errors only. A
current error (error code 70h) is returned when the error was generated
during the execution of a command indicating the check condition.
The DX-Series system supports unit attention condition queuing as
described in the SCSI-2 specification. Other details of processing for this
command are consistent with the SCSI-2 specification.
The format of the Request Sense command is shown in table 51.
• Logical Unit Number
The Logical Unit Number is 0. This field indicates the logical unit to
which the command is sent.
Table 51 Request
Sense Command
Bit/Byte 7 6 5 4 3 2 1 0
0
1
2
3
4
5
• Allocation Length
This field contains the maximum amount of data that may be
returned to the host. Anything greater than 24 returns the full 24
bytes of data.
The format of the Request Sense data is shown in table 52.
Operation Code (03h)
Logical Unit Number Reserved (00h)
Reserved (0000h)
Allocation Length
Reserved (00h)