Maxtor 10K III Manual Do Utilizador

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SCSI Description
Maxtor Atlas 10K III
5-93
Table 5-116   
Persistent Reservation Type Codes and Their Meanings
+,
9
"()**+
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.