Reference Guide

Chapter 4 SCSI Commands
RELEASE (10) Command (57h)
DLT-S4 Interface Reference Guide 278
RELEASE (10) Command (57h) 4
The RELEASE and RESERVE commands provide contention resolution in
multiple-initiator systems. The
RELEASE (10) command releases a
previously reserved logical unit. The tape drive does not return an error if
an initiator attempts to release a reservation that is not currently valid.
Figure 139 RELEASE (10)
Command Descriptor Block —
Data Format
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 (57h)
1 Reserved 3rdPty Reserved LongID Extent (0)
2 Reservation Identification
3 Third Party Device ID
4 — 6 Reserved
7 — 8
(MSB)
Parameter List Length
(LSB)
9 Control