User's Guide

Chapter 2 Emulated Medium Changer SCSI Commands
Request Volume Element Address (B5h)
82 Quantum DX-Series Software Interface Guide
Figure 2 Request
Volume Element
Address Data
Request Volume Element Address Data
Request Volume Element Address Data Header
Element Status Data Page (first or only)
Element Status Data Page Header
Element Descriptor (first or only)
Other Element Descriptors (if any)
.
.
.
.
.
.
Other Status Data Pages (if any)
A single Volume Element Address Header is returned along with 1 or
more element status pages. The Volume Element Address indicates:
• Address of the first element reported
• Number of elements reported
• Action code of the reported Send Volume Tag command
• Size of the report for all requested data
The size of the report is given in bytes. The size is the total number of
bytes that would be contained in the report for all requested data minus
7. The Request Volume Element Address command can be given with
an Allocation Length of 8 to determine how much space must be
allocated to transfer all of the status data requested by the command.
The format for the Volume Element Address Header is shown in
table 54.