Maxtor ATLAS 10K III - Manual (Page 157)

SCSI Description
Maxtor Atlas 10K III 5-93
Table 5-116 Persistent Reservation Type Codes and Their Meanings
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0h READ Shared
READS: Shared; any application client on any initiator may execute com-
mands that perform transfers from the disk to the initiator.
WRITES: Prohibited; any command from any initiator that performs a
transfer from the initiator to the disk results in a reservation conflict.
ADDITIONAL RESERVATIONS: Allowed; any initiator may reserve the log-
ical unit, extents, or elements as long as the persistent reservations do not
conflict with any reservations already known to the device server.
1h
WRITE
Exclusive
READS: Shared; any application client on any initiator may execute com-
mands that perform transfers from the disk to the initiator.
WRITES: Exclusive; any command from any initiator other than the initia-
tor that holds the persistent reservation that attempts a transfer to the
disk results in a reservation conflict
ADDITIONAL RESERVATIONS: Allowed; any initiator may reserve the log-
ical unit, extents, or elements as long as the persistent reservations do not
conflict with any reservations already known to the device server.
2h READ Exclusive
READS: Exclusive; any command from any initiator other than the initiator
that holds the persistent reservation that attempts a transfer from the disk
results in a reservation conflict
WRITES: Shared; any application client on any initiator may execute com-
mands that perform transfers to the disk from the initiator.
ADDITIONAL RESERVATIONS: Allowed; any initiator may reserve the log-
ical unit, extents, or elements as long as the persistent reservations do not
conflict with any reservations already known to the device server.
3h
Exclusive
Access
READS: Exclusive; any command from any initiator other than the initiator
holding the persistent reservation that attempts a transfer from the disk
results in a reservation conflict.
WRITES: Exclusive; any command from any initiator other than the initia-
tor holding the persistent reservation that attempts a transfer to the disk
results in a reservation conflict.
ADDITIONAL RESERVATIONS: Restricted; any PERSISTENT RESERVA-
TION OUT command with the Reserve service action from any initiator
other than the initiator holding the persistent reservation results in a res-
ervation conflict. The initiator that holds the persistent reservation can re-
serve the logical unit, extents, or elements as long as the persistent
reservations do not conflict with any reservations already known to the
device server.
4h Shared Access
READS: Shared; any application client on any initiator may execute com-
mands that perform transfers from the disk to the initiator.
WRITES: Shared; any application client on any initiator may execute com-
mands that perform transfers to the disk from the initiator.
ADDITIONAL RESERVATIONS: Restricted; any PERSISTENT RESERVA-
TION OUT command with the Reserve service action from any initiator
other than the initiator holding the persistent reservation results in a res-
ervation conflict. The initiator that holds the persistent reservation can re-
serve the logical unit, extents, or elements as long as the persistent
reservations do not conflict with any reservations already known to the
device server.