Fujitsu MAP3147 - Persistent Reservation Type Codes

3.1 Control/Sense Commands
C141-E167 3 -
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Table 3.2 Persistent reservation type codes
Code Name Description
0h Reserved
Reads Shared: Any initiator can execute read commands1h Write
Exclusive
Writes Exclusive: Except by an initiator holding a persistent reservation, a write
command executed by any initiator causes a reservation
conflict.
2h Reserved
Reads Exclusive: A read command executed by any initiator except an initiator
holding a persistent reservation causes a reservation conflict.
3h Exclusive
Access
Writes Exclusive: A write command executed by any initiator except an initiator
holding a persistent reservation causes a reservation conflict.
4h Reserved
5h Reads Shared: Any initiator can execute read commandsWrite
Exclusive-
Registrants
Only
Writes Exclusive: A write command executed by any initiator whose reservation
key is not registered using the Register service action causes a
reservation conflict.
Reads Exclusive: A read command executed by any initiator whose reservation
key is not registered using the Register service action causes a
reservation conflict.
6h Exclusive
Access-
Registrants
Only
Writes Exclusive: A write command executed by any initiator whose reservation
key is not registered using the Register service action causes a
reservation conflict.