Quantum DLT 8000 Product Manual page 298

SCSI Commands
PERSISTENT RESERVATION OUT Command (5Fh) (continued)
Table 5–68 presents the definitions of the characters of the available "Type" values from
the Type field of the PERSISTENT RESERVATION IN Read Reservations parameters.
Each of the codes provides handling instructions for READ operations, for WRITE
operations, and for subsequent attempts to establish persistent reservations (referred to
as "Additional Reservations Allowed" in the table).
Table 5–68 Persistent Reservation Type Codes and Their Meanings
Code Name
0h READ Shared
1h WRITE Exclusive
2h READ Exclusive
5-154
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
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)