PERSISTENT RESERVATION IN Command (5Eh) (continued)
Table 5–64 Persistent Reservation Type Codes and Their Meanings
Code
Name
0h
READ Shared
1h
WRITE Exclusive
2h
READ Exclusive
Description
READS: Shared; any application client on any initiator may execute commands
that perform transfers from the target to the initiator.
WRITES:
Prohibited; any command from any initiator that performs a transfer
from the initiator to the target results in a reservation conflict.
ADDITIONAL RESERVATIONS:
READS: Shared; any application client on any initiator may execute commands
that perform transfers from the target to the initiator.
WRITES:
Exclusive; any command from any initiator other than the initiator that
holds the persistent reservation that attempts a transfer to the target
results in a reservation conflict
ADDITIONAL RESERVATIONS:
READS: Exclusive; any command from any initiator other than the initiator that
holds the persistent reservation that attempts a transfer from the
target results in a reservation conflict
WRITES:
Shared; any application client on any initiator may execute commands
that perform transfers to the target from the initiator.
ADDITIONAL RESERVATIONS:
Quantum DLT 8000 Tape System
SCSI Commands
Allowed; any initiator may reserve the logical
unit, extents, or elements as long as the
persistent reservations do not conflict with any
reservations already known to the device
server.
Allowed; any initiator may reserve the logical
unit, extents, or elements as long as the
persistent reservations do not conflict with any
reservations already known to the device
server.
Allowed; any initiator may reserve the logical
unit, extents, or elements as long as the
persistent reservations do not conflict with any
reservations already known to the device
server.
(continued)
5-141