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Code | Name | Description |
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| A PERSISTENT RESERVATION OUT command with Release service action removes a |
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| persistent reservation held by the same initiator. |
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| The fields associated with a Release service action match fields of the active persistent res- |
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| ervation. Sending of a PERSISTENT RESERVATION OUT command that specifies a Re- |
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| lease service action when no persistent reservation exists from that initiator does not result |
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| in an error. Instead, the device server returns a GOOD message without altering any other |
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| reservation: the reservation key is not changed by the Release service action. |
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| The device server returns a CHECK CONDITION status for any PERSISTENT RESER- |
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| VATION OUT command that specifies the release of a persistent reservation held by the |
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| requesting initiator that matches some but not all of the Scope, Type, Reservation Key, and |
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| 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- | ||
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| ues match an existing persistent reservation held by the initiator making the request are not |
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| errors. |
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| An active persistent reservation may also be released by: |
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| 1. Powering off. When the most recent APTPL value received by the device server is 0, a |
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| |
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| reservation keys; |
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| or |
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| 2. Executing a PERSISTENT RESERVATION OUT command from another initiator with |
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| a persistent reserve service action of |
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| Note that a Release service action should not be performed if any operations interlocked by |
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| the persistent reservation have not yet completed. |
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| A PERSISTENT RESERVATION OUT command with a successful Clear service action |
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| removes all persistent reservations for all initiators. All reservation keys are also removed. |
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| Any commands from any initiator that have been accepted by the device server as |
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| flicting continue their normal executions. |
03h | Clear | A UNIT ATTENTION condition is established for all initiators for the cleared logical unit. |
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| The sense key is set to UNIT ATTENTION; the additional sense data is set to RESERVA- |
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| TIONS PREEMPTED. |
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| Note that applications should not use the Clear action service except during recoveries as- |
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| sociated with initiator or system reconfiguration, since data integrity may be compromised. |