Commands 103
Commands
The Number of Volumes Available indicates the number of partitions
available. Since Ultrium drives do not support multiple volumes, this is 1.
MAM Attribute Data
Attribute data sent with a WRITE ATTRIBUTE command or returned in response
to a
READ ATTRIBUTE command has the following format:
The format implies nothing about the physical representation of the data in the
Medium Auxiliary Memory.
7 6 5 4 3 2 1 0
0
(MSB)
Attribute ID
1
(LSB)
2
Read-Only Reserved (0) Format
3
(MSB)
Attribute Length (n
-4)
4
(LSB)
5
(MSB)
Attribute Value
n
(LSB)
Attribute ID The binary identifier for a single attribute. See “Attribute ID Values” on page 104 for a
description of attribute ID values.
Read-Only Specifies whether an attribute is read-only. The bit is ignored by the READ ATTRIBUTE
command.
0 The attribute may be changed by the WRITE ATTRIBUTE command.
1 The attribute cannot be changed by WRITE ATTRIBUTE.
Format Specifies the data format of the attribute. The possible values are:
Value Description
00h Binary. The attribute contains binary data.
01h ASCII. Attributes contain only graphic codes (code values 20h–7Eh) and must be
left-aligned.
02h Text. The attribute contains textual data. The character set is as described in the
Text Localization Identifier attribute in
“Host Common Attributes” on
page 107
.
Attribute Length The length in bytes of the Attribute Value field.
Comments to this Manuals