
Chapter 3 Media Changer Commands
Read Element Status Command (B8h)
128 Quantum ATL SuperLoader Software Interface Guide
Element Status
Data
3
The data returned by the READ ELEMENT STATUS command is
defined in figure 64
and Element Status Page on page 130 through
Data Transfer Element Descriptor
on page 137. Element status data
consists of an eight-byte header, followed by zero or more element
status pages.
Figure 64 Element
Status Data Header
DVCID Must be set to 0. Reporting of device identifiers is not supported.
Allocation Length Specifies the number of bytes to be returned. If it is not sufficient to
transfer all the requested element descriptors, the SuperLoader will only
transfer those descriptors that can be completely transferred and this
shall not be considered an error.
Bit
Byte7654 3210
0-1
First Element Address Reported
2-3
(MSB)
Number Of Elements Available
(LSB)
4
Reserved
Field Name Description
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