Datasheet

Command Specifications
4-124 C141-C008
Table 4.87 Persistent reservations type codes
Code Name Description
0h Reserved
Reads Shared: Any application client on any initiator may execute
tasks that request transfers from the storage medium or cache of the
logical unit to the initiator.
1h Write
Exclusive
Writes Exclusive: Any task from any initiator other than the initiator
holding the persistent reservation that requests a transfer from the
initiator to the storage medium or cache of the logical unit shall result
in a reservation conflict.
2h Reserved
Reads Shared: Any task from any initiator other than the initiator
holding the persistent reservation that requests a transfer from the
storage medium or cache of the logical unit to the initiator shall result
in a reservation conflict.
3h Exclusive
Access
Writes Exclusive: Any task from any initiator other than the initiator
holding the persistent reservation that requests a transfer from the
initiator to the storage medium or cache of the logical unit shall result
in a reservation conflict.
4h Reserved
5h Write
Exclusive-
Registrants
Only
Reads Shared: Any application client on any initiator may execute
tasks that request transfers from the storage medium or cache of the
logical unit to the initiator.
Writes Exclusive: A task that requests a transfer to the storage medium
or cache of the logical unit from an initiator that is not currently
registered with the device server shall result in a reservation conflict.
Reads Exclusive: A task that requests a transfer from the storage
medium or cache of the logical unit to an initiator that is not currently
registered with the device server shall result in a reservation conflict.
6h Exclusive
Access-
Registrants
Only
Write Exclusive: A task that requests a transfer to the storage medium
or cache of the logical unit from an initiator that is not currently
registered with the device server shall result in a reservation conflict.
7h-Fh Reserved