Sony SDX-900V Product Specifications page 121

PERSISTENT RESERVE OUT
Bit 7
Byte
0 (MSB)
7
8 (MSB)
15
16 (MSB)
19
20
21
22
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
Action Scope
REGISTER ignored
RESERVE Logical Unit
RELEASE Logical Unit
CLEAR Ignored
PREEMPT Logical Unit
PREEMPT Logical Unit
& CLEAR
SONY AIT-4 drive SDX-900V series Ver.2.1
Table 6-61: PERSISTENT RESERVE OUT parameter list
6 5
Reservation Key
SERVICE ACTION Reservation Key
SCOPE-SPECIFIC Address
Reserved
TYPE
Ignored
Valid
Valid
Ignored
Valid
Valid
4 3 2
(0 0 0 0)
Reserved
Obsolete
Parameters
SERVICE ACTION
RESERVATION KEY
Valid
Ignored
Ignored
Ignored
Valid
Valid
6.Command Specification
1 0
(LSB)
(LSB)
(LSB)
APTPL
SCOPE- SPECIFIC
Address
Ignored
Ignored
Ignored
Ignored
Ignored
Ignored
6-63