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Chapter 3 Media Changer Commands

Persistent Reserve Out Command (5Fh)

Quantum ATL SuperLoader Software Interface Guide 105

Table 45 Persistent

Reserve Out

Command Service

Action

Code Name Description

00h Register When the command executes a Register service action, it registers a

reservation key with a device server without generating a reservation. The

device server holds these reservation keys from each initiator that

performs a PERSISTENT RESERVE OUT command with a Register

service action until the key is changed by a new PERSISTENT RESERVE

OUT command with Register service action from the same initiator, or

until the initiator registration is removed by:

Powering down the logical unit, if the last Activate Persist Through Power

Loss (APTPL; see figure 56

on page 112 and table 47 on page 113) received

by the device server was 0;

Performing a Clear service action;

Performing a Pre-empt service action;

Performing a Pre-empt and Clear service action; or

Performing a Register service action from the same initiator with the

value of the service action reservation key set to 0.

When a reservation key has not yet been established or when the

reservation key has been removed, a reservation key of 0 is used when the

initiator performs a PERSISTENT RESERVE OUT with the Register

service action. When the reservation has been removed, no information is

reported for the initiator in the Read Keys service action of the resulting

PERSISTENT RESERVE IN command.

01h Reserve A PERSISTENT RESERVE OUT command with Reserve service action

creates a persistent reservation with a specified Scope and Type.

Persistent reservations are not superseded by a new persistent reservation

from any initiator except by the execution of a PERSISTENT RESERVE

OUT command that specifies a Release, Clear, Pre-empt, or Pre-empt and

Clear service action.

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Quantum SuperLoader Guide de l'utilisateur Page 123