Reference Guide

Chapter 4 SCSI Commands
REQUEST SENSE Command (03h)
DLT-S4 Interface Reference Guide 305
REQUEST SENSE Command (03h) 4
The REQUEST SENSE command directs the DLT-S4 tape drive to transfer
detailed Sense Data to the initiator.
Figure 158 REQUEST SENSE
Command Descriptor Block —
Data Format
Table 171 REQUEST SENSE
Command Data — Field
Descriptions
Bit
7 6 5 4 3 2 1 0
Byte
0 Operation Code (03h)
1 Reserved DESC
2 — 3 Reserved
4 Allocation Length
5 Control
Field Description
DESC Descriptor. Indicates which sense data format the
drive returns. The drive does not support
descriptor format sense data. Must be set to 0,
indicating that the drive returns fixed format sense
data.
Allocation
Length
Specifies the maximum number of Sense Data
bytes to be returned. The drive terminates the
transfer when it has transferred this number of
bytes or all available Sense Data to the host,
whichever is less.