Reference Guide

Chapter 4 SCSI Commands
RESERVE UNIT Command (16h)
DLT-S4 Interface Reference Guide 320
Table 177 RESERVE (10) ID
Only Parameter List — Data
Format
RESERVE UNIT Command (16h) 4
The RESERVE UNIT command reserves the specified tape drive for the
exclusive use of the requesting initiator or for another specified SCSI
device.
Figure 160 RESERVE UNIT
Command Descriptor Block —
Data Format
Bit
7 6 5 4 3 2 1 0
Byte
0 — 7
(MSB)
Third Party Device ID
(LSB)
Note:
This command has been made obsolete in the latest version of
SCSI-3 and should not be used with any new implementations.
The tape drive supports this command for legacy applications
only.
Bit
7 6 5 4 3 2 1 0
Byte
0 Operation Code (16h)
1 Logical Unit Number 3rdPty Third Party Device ID Reserved
2 — 4 Reserved
5 Control