3.1.18.1.2 Read Reservations; 3.1.18.2 Persistent Reserve In Parameter Data For Read Keys - Fujitsu MAP3147 Scsi Logical Interface Specifications

3.1.18.1.2 READ RESERVATIONS

In the READ RESERVATION service action, the drive transfers the following information to the
initiator as a parameter data list.
Current generation value (See Section 3.1.18.2)
Reservation keys registered by initiators that keep persistent reservations
Scope value and type value
Scope-specific address (only the Element scope)
When the READ RESERVATION service action is executed, if no persistent reservation is held by
the drive, zero is set in the Additional Length field, which is transferred as parameter data, on the
list.

3.1.18.2 PERSISTENT RESERVE IN parameter data for READ KEYS

The format for parameter data transferred in the READ KEYS service action of the PERSISTENT
RESERVE IN command is shown below.
Bit
Byte
0
~
3
Header
4
~
7
8
~
15
~
Reservation
~
key list
n-7
~
n
The "Generation" field contains a 32-bit counter value maintained by the driver. This counter value
is incremented every time the PERSISTENT RESERVE OUT command requests execution of the
REGISTER, REGISTER AND IGNORE EXISTING KEY, CLEAR, PREEMPT, or PREEMPT
AND ABORT service action.
C141-E167
7 6
(MSB)
~
(MSB)
~
(MSB)
~
~
~
(MSB)
~
5 4 3
Generation
Additional Length (n-7)
First reservation key-1
Last reservation key-m
3.1 Control/Sense Commands
2 1 0
(LSB)
(LSB)
(LSB)
(LSB)
~
~
~
~
~
~
51
3 -