Quantum 1200 Series DAT Autochanger Betriebsanweisung PDF herunterladen (Seite 225)

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101

SDLT 600 SCSI Interface Guide Chapter 4: SCSI Commands

81-81200-02 REV A01 January 2005 4-183

4.17 READ BUFFER Command (3Ch)

The READ BUFFER command is used with the WRITE BUFFER command as a diagnostic function

for testing the SDLT tape drive’s data buffer for possible diagnostic data and for checking the integrity

of the SCSI bus. Buffers 01h and 02h provide a diagnostic capability for the drive’s firmware, buffer

03h is used to read the DMARK table, and buffers A1h and A2h provide access to diagnostic error

information.

Figure 4-95. READ BUFFER Command Descriptor Block — Data Format

Bit

Byte

7 6 5 4 3 2 1 0

0 Operation Code (3Ch)

1 Reserved Mode

2 Buffer ID

3 – 5

(MSB)

Buffer Offset

(LSB)

6 – 8

(MSB)

Allocation Length

(LSB)

9 Comp Control

SDLT 600

SCSI Interface Guide

SCSI Commands

81-81200-02

REV A01

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