Reference Guide

Chapter 4 SCSI Commands
READ BUFFER Command (3Ch)
DLT-S4 Interface Reference Guide 264
READ BUFFER Command (3Ch) 4
The READ BUFFER command is used with the WRITE BUFFER command
as a diagnostic function for testing the tape drive’s data buffer for
possible diagnostic data and for checking the integrity of the SCSI bus or
Fibre Channel or SAS network.
Figure 129 READ BUFFER
Command Descriptor Block —
Data Format
Bit
7 6 5 4 3 2 1 0
Byte
0 Operation Code (3Ch)
1 Reserved Mode
2 Buffer ID
3 — 5
(MSB)
Buffer Offset
(LSB)
6 — 8
(MSB)
Allocation Length
(LSB)
9 Control