User's Guide

Chapter 2 Media Changer Commands
Request Sense Command (03h)
Quantum SuperLoader 3 Software Interface Guide 122
Request Sense Command (03h)
The REQUEST SENSE command causes the media changer to transfer
detailed sense data to the initiator.
Figure 73 Request Sense
Command Descriptor Block
Figure 74 Request Sense
Command Data
The sense data is valid for a CHECK CONDITION or RESERVATION
CONFLICT
status returned on the previous command. The sense data
bytes are preserved by the media changer until retrieved by a
REQUEST
SENSE
command, or until the receipt of any other command from the
same initiator, though some commands, such as
INQUIRY, do not change
sense data.
Bit
Byte76543210
0
Operation Code (03h)
1
Logical Unit Number Reserved
2 - 3
Reserved
4
Allocation Length
5
Unused Reserved Flag Link
Field Description
Allocation
Length
This field specifies the maximum number of sense
bytes to be returned. The media changer terminates the
transfer when this number of bytes has been
transferred or when all available sense data has been
transferred to the host, whichever is less.