Hitachi ULTRASTAR 15K450 HUS154530VLF400 - Manual (Page 220)

Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
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19.13.3 Parameter list
The Parameter List required to perform the PERSISTENT RERSERVE OUT command is defined in the table below. All
fields must be sent on all PERSISTENT RESERVE OUT commands, even if the field is not required for the specified service
action.
Table 171: Parameter List
Reservation Key contains an 8-byte value provided by the initiator, and identifies the initiator that issued the PERSISTENT
RESERVE OUT command. The Reservation Key must match the registered reservation key for the initiator for all service
actions except REGISTER and REGISTER AND IGNORE EXISTING KEY.
Service Action Reservation Key contents vary based on the service action. For REGISTER and REGISTER AND IGNORE
EXISTING KEY, the Service Action Reservation Key must contain the new reservation key to be registered. For PREEMPT
and PREEMPT AND ABORT , the field contains the reservation key of the persistent reservation that is being preempted.
This field is ignored for all other service actions.
Scope-Specific Address is ignored.
APTPL (Activate Persist Through Power Loss) bit is valid only for REGISTER and REGISTER AND IGNORE EXIST-
ING KEY, and is ignored for all other service actions. If the last valid APTPL bit value received is zero, power loss will cause
all persistent reservations to be released, and all reservation keys to be removed. If the last valid APTPL bit value received is
one, any persistent reservation and all reservation keys for all initiators will be retained across power cycles.
Byte
Bit
7 6 5 4 3 2 1 0
0-7
(MSB)
Reservation Key
(LSB)
8-15
(MSB)
Service Action Reservation Key
(LSB)
16-19
(MSB)
Scope-Specific Address
(LSB)
20 Reserved = 0 APTPL
21-23 Reserved = 0