Reference Guide

Chapter 4 SCSI Commands
READ ATTRIBUTE Command (8Ch)
DLT-S4 Interface Reference Guide 241
VOLUME LIST Service Action 4
The READ ATTRIBUTE command with the VOLUME LIST service action
returns parameter data (see figure 121
) identifying the supported number
of volumes. The contents of the Volume Number, Partition Number, and
First Attribute Identifier fields in the CDB are ignored.
Figure 121 READ ATTRIBUTE
with VOLUME LIST Service
Action — Parameter List
Format
Table 134 READ ATTRIBUTE
with VOLUME LIST Service
Action Parameter Data — Field
Descriptions
Bit
7 6 5 4 3 2 1 0
Byte
0 — 1
(MSB)
Available Data (02h)
(LSB)
2 First Volume Number
3 Number of Volumes Available
Field Description
First Volume
Number
Indicates the first volume available. Volume
numbering starts at 0.
Available Data Preset to 02h.
First Volume
Number
Indicates the first volume available. Volume
numbering starts at 0.
Number of
Volumes
Available
Indicates the number of volumes that are available.
Tape drives only support one volume on the
medium.