REQUEST VOLUME ELEMENT ADDRESS (B5h)
The REQUEST VOLUME ELEMENT ADDRESS command is used to transfer the results of the SEND
VOLUME TAG command. Multiple REQUEST VOLUME ELEMENT ADDRESS commands may be used to
retrieve the results of a single SEND VOLUME TAG command with the translate option.
Bit 7 6 5 4 3 2 1 0
Byte
0 Operation Code (B5h)
1 LUN VolTag Obsolete
2 (MSB) Element Address
3 (LSB)
4 (MSB) Number Elements to Report
5 (LSB)
6 Reserved
7 (MSB)
8 Allocation Length
9 (LSB)
10 Reserved
11 Control
For each Send Volume Tag command, the library shall report in response to a Request Volume Element
Address command zero or more elements that match a volume tag template in element address order.
Once information for a given element address has been reported, only higher element addresses shall be
reported by subsequent Request Volume Element Address commands.
Field descriptions:
VolTag:
A VolTag bit of one indicates that the library shall report volume tag information. A value of zero
indicates that the volume tag information shall not be reported.
Element Address:
The Element Address field specifies a media changer element address whose interpretation
depends on the Send Action Code field of the last successful Send Volume Ta g command. When
the Send Action Code field was a translate, the Element Address field gives the minimum element
address to be reported by this command. When the Send Action Code field is assert, replace, or
undefine, the Element Address field gives the particular element whose volume tag information
was modified.
Number of Elements to Report:
The Number of Elements to Report field specifies the maximum number of elements to report of
those that match the last Send Volume Ta g command translate template.
Allocation Length:
If the Allocation Length is not sufficient to transfer all the element descriptors, the library shall only
return those descriptors whose complete contents fit within the allocation length.
Chapter 3. Supported SCSI Commands 3-79
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