Request Volume Element Address
96122 • Revision: F Chapter 6 SCSI Commands 221
Volume Element Address Header Definition
The Volume Element Address Header is sent once for each command.
TABLE 6-92 Volume Element Address Header
Byte
Bit
76543210
0
to
1
(MSB) First Element Address Reported
(LSB)
2
to
3
(MSB) Number of Elements Available
(LSB)
4 Reserved (0h) Send Action Code (5h)
5
to
7
(MSB) Byte Count of Report Available (all pages, n-7)
(LSB)
8
to
n
Element Status pages
Volume Element Address Header Definitions:
First Element Address
Reported
This field indicates the lowest element address found of the type specified in the
Element Type Codes and greater than/equal to the starting address.
Number of Elements
Available
This field indicates the number of elements found of the type specified in the
Element Type Codes and greater than or equal to the Starting Element Address.
This number is adjusted to be less than or equal to the count specified in the
Number of Elements field.
Send Action Code This field contains the value of the send action code field from the previous
Send Volume Tag command. The value is 5h.
Byte Count of Report
Available
This field indicates the number of bytes of element status data available for all
elements that meet the requirements of the Request Volume Element Address
command.
This count does not include the Element Status Data header bytes.
This value is not adjusted to match the allocation length from the command.
Element Status Pages The element pages returned by a Request Volume Element Address command
are the same format as returned by the Read Element Status command.
See “Read Element Status” on page 181 for more information.
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