User's Guide

Chapter 2 Emulated Medium Changer SCSI Commands
Read Element Status (B8h)
Quantum DX-Series Software Interface Guide 59
The page header (bytes 0-7) defines the contents of the element
descriptors for the elements of that type. The format of a status page is
shown in
table 41.
Table 41 Element
Status Page
Bit/Byte 7 6 5 4 3 2 1 0
0
1
2
3
4
5
6
7
8 - X
•PVolTag
•A Primary Volume Tag field value of 1 indicates the primary
volume tag information field is present in each of these element
descriptor blocks
• A value of 0 indicates these bytes are omitted from the element
descriptors that follow
•AVolTag
•An Alternate Volume Tag field value of 1 indicates the alternate
volume tag information field is present in each of these element
descriptor blocks
• A value of 0 indicates these bytes are omitted from the element
descriptors that follow
• Element Descriptor Length
Field indicates the number of bytes in each element descriptor.
Element Type Code
PVol
Tag
AVol
Tag
Reserved (00h)
(MSB)
Element Descriptor Length
(LSB)
Reserved (00h)
(MSB)
Byte Count of Descriptor Data Available
(LSB)
One or More Element Descriptors