Reference Guide

Chapter 4 SCSI Commands
PERSISTENT RESERVE OUT Command (5Fh)
DLT-S4 Interface Reference Guide 221
See table 123 for detailed descriptions of each of the PERSISTENT
RESERVE OUT
command’s seven possible service actions (Service Action
codes appear in bits 0 to 4 of Byte 1).
02h Release Releases a persistent reservation.
03h Clear Clears all Reservation Keys and all persistent
reservations.
04h Preempt Preempts persistent reservations from another
initiator.
05h Preempt & Abort Preempts persistent reservations and/or removes
registrations and aborts all tasks for all preempted I_T
nexuses.
06h Register and Ignore
Existing Key
Registers a Reservation Key with the tape drive;
Existing Reservation Key is ignored.
07h Register and Move Registers the specified initiator port and moves the
reservation to the initiator port.
See table 123
for detailed descriptions of each of the Service Action codes.
Scope The drive only supports reservations of the entire logical unit. Must be set to 0.
Type Specifies the characteristics of the persistent reservation being established for all data
blocks within the extent or within the logical unit (see table 124
for the applicable Type
codes and their meanings).
Parameter
List Length
Fields contained in the
PERSISTENT RESERVE OUT parameter list specify the
Reservation Keys and extent information required to perform a persistent reservation.
Field Description