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C141-E124-01EN 3 - 67
3.1.19.2 PERSISTENT RESERVE OUT parameter list
The parameter list required to perform the PERSISTENT RESERVE OUT command are defined
below.
All fields shall be sent on all PERSISTENT RESERVE OUT commands, even if the field is not
required for the specified service action and scope values.
Bit
Byte
76543210
0(MSB)
Reservation Key
7(LSB)
8(MSB)
Service Action Reservation Key
15 (LSB)
16 (MSB)
Scope-specific Address
19 (LSB)
20 Reserved APTPL
21-23 X'000000' (Reserved)
The "Reservation Key" field contains an 8-byte value provided by the application client to the
device server to identify the initiator that is the source of the PERSISTENT RESERVE OUT
command. The device server 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:
a) the REGISTER AND IGNORE EXISTING KEY service action where the "Reservation Key"
field shall be ignored; and
b) the REGISTER service action for an unregistered initiator which shall have a reservation key
value of zero.
Except as noted above, when a PERSISTENT RESERVE OUT command specifies a "Reservation
Key" field other than the reservation key registered for the initiator the device server shall return a
RESERVATION CONFLICT status. Except as noted above, the reservation key of the initiator
shall be verified to be correct regardless of the "Service Action" and "Scope" field values.
The "Service Action Reservation Key" field contains information needed for four service actions;
the REGISTER, REGISTER AND IGNORE EXISTING KEY, PREEMPT, and PREEMPT AND
ABORT service actions. For the REGISTER and REGISTER AND IGNORE EXISTING KEY
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.
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