User's Guide

Quantum Scalar Intelligent Libraries SCSI Reference Guide Guide 75
Report LUNS – A0h
What the Library Does With This Command
The library will return a list of the logical units that it supports. When this command is sent to a DA blade
Controller logical unit or Media Changer logical unit, at LUN 0, it will return a list of all additional logical units
that are available. This list will primarily be Media Changer devices representing the configured Logical
Libraries. When this command is sent to any of the Media Changer logical units, they will only report
themselves.
Command Usage
This command can be used to retrieve what Logical Unit Numbers are supported to avoid scanning for all
possible numbers. It is useful for identifying the various Logical Libraries that may be configured.
Report LUNS CDB Format
The REPORT LUNS CDB format is shown in the following table.
Allocation Length – This field must be set to a minimum of 10h (16 bytes) to retrieve information for at least
a single LUN.
Table 73 REPORT LUNS CDB format
Bit
Byte
76543210
0 Op Code (A0h)
1 Reserved
2 Reserved
3 Reserved
4 Reserved
5 Reserved
6
:
9
Allocation Length
10 Reserved
11 Control