Maxtor 10K V manual Tions Preempted

Code	Name	Description
		A PERSISTENT RESERVATION OUT command with Release service action removes a
		persistent reservation held by the same initiator.
		The fields associated with a Release service action match fields of the active persistent res-
		ervation. Sending of a PERSISTENT RESERVATION OUT command that specifies a Re-
		lease service action when no persistent reservation exists from that initiator does not result
		in an error. Instead, the device server returns a GOOD message without altering any other
		reservation: the reservation key is not changed by the Release service action.
		The device server returns a CHECK CONDITION status for any PERSISTENT RESER-
		VATION OUT command that specifies the release of a persistent reservation held by the
		requesting initiator that matches some but not all of the Scope, Type, Reservation Key, and
		extent values. The sense key is set to ILLEGAL REQUEST and additional sense data is set
02h	Release	to INVALID RELEASE OF ACTIVE PERSISTENT RESERVATION. Attempts to release
		persistent reservations in which none of the Scope, Type, Reservation Key, and extent val-
		ues match an existing persistent reservation held by the initiator making the request are not
		errors.
		An active persistent reservation may also be released by:
		1. Powering off. When the most recent APTPL value received by the device server is 0, a
		power-off performs a hard reset, clears all persistent reservations, and removes all registered
		reservation keys;
		or
		2. Executing a PERSISTENT RESERVATION OUT command from another initiator with
		a persistent reserve service action of Pre-empt or Pre-empt and Clear.
		Note that a Release service action should not be performed if any operations interlocked by
		the persistent reservation have not yet completed.
		A PERSISTENT RESERVATION OUT command with a successful Clear service action
		removes all persistent reservations for all initiators. All reservation keys are also removed.
		Any commands from any initiator that have been accepted by the device server as non-con-
		flicting continue their normal executions.
03h	Clear	A UNIT ATTENTION condition is established for all initiators for the cleared logical unit.
		The sense key is set to UNIT ATTENTION; the additional sense data is set to RESERVA-
		TIONS PREEMPTED.
		Note that applications should not use the Clear action service except during recoveries as-
		sociated with initiator or system reconfiguration, since data integrity may be compromised.

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