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HSG80 Array Controller V8.7 Command Line Interface Reference Guide
CLI Command Descriptions
When FAIL_ALL is specified, all the members of the association set assume the
same failsafe lock condition if they are in failsafe error mode. Failsafe lock is
enabled by the ERROR_MODE switch of the SET remote-copy-set-name
command. If one member of the association set becomes failsafe locked, any
association set member that has failsafe lock enabled also becomes failsafe
locked.
When NOFAIL_ALL is specified, the members of the association set react
independently to failsafe lock conditions. One member of the association set
becoming failsafe locked has no effect on the other members of the association
set.
This switch has no effect if all members of the association set have failsafe lock
disabled (normal error mode).
LOG_UNIT=unit-name
NOLOG_UNIT
Specifying LOG_UNIT assigns a dedicated log unit for the association set. Should
the initiator become unable to access the target, the unit specified by unit-name
logs a history of write commands from the host. When the target becomes
accessible, the initiator can read the log disk and can send the write commands, in
order, to the target, which brings the target into congruency with the initiator.
CAUTION: When the command is entered, a header is immediately written to the log
unit, which may make it difficult or impossible to recover any user data previously
written on the unit. Care should be taken in specifying which unit should be the log
unit.
The log unit must be either a mirrorset or a striped mirrorset. It cannot be a
partitioned unit. The log unit must reside at the initiator site and cannot be moved
to the target site. In addition, it must have the following characteristics:
•
Write-back caching disabled
•
Access disabled
•
Other unit settings at default
This switch is valid only if all members of the association set are in normal (not
failsafe) error mode. Error mode is determined by the ERROR_MODE switch of
the SET remote-copy-set-name command.
Specifying NOLOG_UNIT deassigns the log unit.