M2488 PRODUCT GUIDE MEDIA CHANGER COMMANDS
March 1997 CG00000-011503 REV. A 6-23
6-2.5.2.2 Element Status Page
Each Element status page contains one 8 byte header followed by one or more Element descrip-
tors. A diagram of the Element Status Page header is shown in Table 6-23 and described in
Table 6-24. All Element descriptors in one page are for the same type of medium-changer ele-
ment and are of equal length.
Table 6-23. Element Status Page Header
BITS
BYTES 7 6 5 4 3 2 1 0
0
Element Type Code
1
Reserved
2-
3
MSB
Element Descriptor Length
LSB
4
Reserved
5-
7
MSB
Byte Count of Descriptor Data Available
LSB
Table 6-24. Element Status Page Header Field Description
BYTE BIT VALUE DESCRIPTION
0 All element descriptors in one page are of the same type, the Element type code
field indicates the medium-changer element type for the element descriptors in the
page. The upper four bits of this field are always 0; the bottom four bits contain one
of the code values shown in Table 6-18 on page 6- 20.
2-3 0 The Element descriptor length field indicates the number of bytes in each of the Ele-
ment descriptors within the page. The value in this field is not adjusted for the allo-
cation length.
5-7 2 The byte count of the descriptor data available field indicates the number of bytes of
element descriptor data available for elements of this element type meeting the
request in the CDB. This value is not adjusted to match the allocation length avail-
able.
