Maxtor ATLAS 10K III - Manual (Page 158)

SCSI Description
5-94 Maxtor Atlas 10K III
Table 5-117 represents graphically all possible combinations of Persistent Reservations
Being Attempted when Persistent Reservations are already held for each of the types
of persistent reservations.
Table 5-117
When Do Conflicts Between Existing Reservations and New Reservations Exist?
5h
WRITE
Exclusive,
Registrants
Only
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 an initiator that has not previously
performed a Register service action with the device server 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 to not
conflict with any reservations already known to the device server.
6h
Exclusive
Access,
Registrants
Only
READS: Exclusive; any command from an initiator that has not previously
performed a Register service action with the device server that attempts
a transfer from the disk results in a reservation conflict.
WRITES: Exclusive; any command from an initiator that has not previously
performed a Register service action with the device server 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 to not
conflict with any reservations already known to the device server.
7h - Fh Reserved N/A
2GTUKUVGPV 4GUGTXCVKQP #NTGCF[ *GNF
Persistent
Reservation
Being At-
tempted
READ
Shared
LU EX
WRITE
Exclu-
sive
LU EX
READ
Exclu-
sive
LU EX
Exclu-
sive
Access
*
LU EX
Shared
Access
*
LU EX
WRITE
Exclu-
sive
RO
LU EX
Exclu-
sive
Access
RO
LU EX
LU
READ Shared
EX
N N
N N
Y Y
Y O
Y Y
Y O
Y Y
Y O
N N
N N
Y Y
Y O
Y Y
Y O
LU
WRITE
Exclusive
EX
Y Y
Y O
Y Y
Y O
Y Y
Y O
Y Y
Y O
Y Y
Y O
Y Y
Y O
Y Y
Y O
LU
READ
Exclusive
EX
Y Y
Y O
Y Y
Y O
Y Y
Y O
Y Y
Y O
Y Y
Y O
Y Y
Y O
Y Y
Y O
LU
Exclusive
Access *
EX
Y Y
Y O
Y Y
Y O
Y Y
Y O
Y Y
Y O
Y Y
Y O
Y Y
Y O
Y Y
Y O
%QFG 0COG &GUETKRVKQP