Sony SDX-800V/R manual Type Service Action SCOPE- Specific Reservation KEY, Address

PERSISTENT RESERVE OUT									6.Command Specification
			Table 6-61: PERSISTENT RESERVE OUT parameter list
Bit	7	6		5		4	3	2	1	0
Byte
0	(MSB)					Reservation Key
7										(LSB)
8	(MSB)				SERVICE ACTION Reservation Key
15										(LSB)
16	(MSB)				SCOPE-SPECIFIC Address
19					(0 0 0 0)					(LSB)
20						Reserved				APTPL
21						Reserved
22						Obsolete
23

Reservation Key: This field contains an 8-byte value provided by the application client to the drive to identify the initiator that is the source of the PERSISTENT RESERVE OUT command. The drive shall verify that the Reservation Key field in a PERSISTENT RESERVE OUT command matches the registered reservation key for the initiator from which the task was received, except for the REGISTER service action for an unregistered initiator which shall have a reservation key value of zero. If a PERSISTENT RESERVE OUT command specifies a Reservation Key field other than the reservation key registered for the initiator, the drive shall return a RESERVATION CONFLICT status. The reservation key of the initiator shall be verified to be correct regardless of the SERVICE ACTION and SCOPE field values.

SERVICE ACTION Reservation Key: This field contains information needed for three service actions; the REGISTER, PREEMPT, and PREEMPT AND ABORT service actions. For the REGISTER service action, the SERVICE ACTION Reservation Key field contains the new reservation key to be registered. For the PREEMPT and PREEMPT AND ABORT service actions, the SERVICE ACTION Reservation Key field contains the reservation key of the persistent reservations that are being preempted. The SERVICE ACTION Reservation Key field is ignored for all other service actions.

SCOPE-SPECIFIC Address: The drive do not support an Element reservation, then this field shall be set to zero.

APTPL: The Activate Persistent Through Power Loss(APTPL) bit is not supported by the drive. If this bit is set a CHECK CONDITION status is returned with an INVALID FIELD IN PARAMETER LIST.

The loss of power in the target shall release the persistent reservation for all logical units and remove all reservation keys.

Table 6-62 summarizes which field are set by the application client and interpreted by the drive for each service action and scope value.

Table 6-62: PERSISTENT RESERVE OUT service actions and valid parameters

Service	Allowed		Parameters
Action	Scope	TYPE	SERVICE ACTION	SCOPE- SPECIFIC
			RESERVATION KEY	Address
REGISTER	ignored	Ignored	Valid	Ignored
RESERVE	Logical Unit	Valid	Ignored	Ignored
RELEASE	Logical Unit	Valid	Ignored	Ignored
CLEAR	Ignored	Ignored	Ignored	Ignored
PREEMPT	Logical Unit	Valid	Valid	Ignored
PREEMPT	Logical Unit	Valid	Valid	Ignored
& CLEAR

SONY AIT-3Ex drive SDX-800V series Ver.1.1 6-63