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101

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.

1 2 ... 270 271 272 273 274 275 276 277 278 279 280 ... 385 386

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