User's Guide

86 SCSI Commands
There are only up to four Element Status Pages, one for each element type. The element status pages are
identical to those described for the READ ELEMENT STATUS command in Element Status Page. The
element descriptors within each page are also the same as those described for READ ELEMENT STATUS
in Element Descriptors.
One header is returned for each REQUEST VOLUME ELEMENT ADDRESS command. The format is
shown in the following table.
First Element Address Reported - This field indicates the lowest element address found that meets the
CDB request.
Number of Elements Available - This field indicates the number of elements found that meet the CDB
request.
Send Action Code – This field contains the action code that was sent in the SEND VOLUME TAG
command. The value is 5h.
Byte Count of Report Available - This field indicates the number of available element status bytes that
meet the CDB requirements. The value does not include the eight-byte element status header, and is not
adjusted to match the value specified in the Allocation Length field of the CDB. This facilitates first issuing
a REQUEST VOLUME ELEMENT ADDRESS command with an allocation length of eight bytes in order to
determine the allocation length required to transfer all the element status data specified by the command.
Table 82 Element Status Header
Bit
Byte
76543210
0
First Element Address Reported
1
2
Number of Elements Available
3
4 Reserved Send Action Code (5h)
5
:
7
Byte Count of Report Available