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5-78 Maxtor Atlas 10K V
Table 5-110 Persistent Reservation Type Codes and Their Meanings
Code Name Description
0h READ Shared
READS: Shared; any application client on any initiator may execute commands 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 logical
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 commands that
perform transfers from the disk 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 disk results in a reserva-
tion conflict
ADDITIONAL RESERVATIONS: 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.
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 commands that
perform transfers to the disk from the initiator.
ADDITIONAL RESERVATIONS: 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.
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 initiator holding
the persistent reservation that attempts a transfer to the disk results in a reservation
conflict.
ADDITIONAL RESERVATIONS: Restricted; any PERSISTENT RESERVATION
OUT command with the Reserve service action from any initiator other than the ini-
tiator holding the persistent reservation results in a reservation conflict. The initiator
that holds the persistent reservation can 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.
4h Shared Access
READS: Shared; any application client on any initiator may execute commands that
perform transfers from the disk to the initiator.
WRITES: Shared; any application client on any initiator may execute commands that
perform transfers to the disk from the initiator.
ADDITIONAL RESERVATIONS: Restricted; any PERSISTENT RESERVATION
OUT command with the Reserve service action from any initiator other than the ini-
tiator holding the persistent reservation results in a reservation conflict. The initiator
that holds the persistent reservation can 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.