Maxtor 10K V ユーザーズマニュアル

Maxtor Atlas 10K V

5-87

Table 5-115 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 5-115   

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 res-

ervations already known to the device server. 

1h

WRITE Exclu-

sive

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 reservation con-

flict

ADDITIONAL RESERVATIONS: Allowed; any initiator may reserve the logical unit, 

extents, or elements as long as the persistent reservations do not conflict with any res-

ervations 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 res-

ervations 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 con-

flict.

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 con-

flict.

ADDITIONAL RESERVATIONS: Restricted; any PERSISTENT RESERVATION 

OUT command with the Reserve service action from any initiator other than the initiator 

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.