HP StorageWorks Auto Path for AIX, v04.02 - Installation Guide (B7949-96005)

22 HP StorageWorks Auto Path for AIX: Installation Guide
Configuration and operation
Setting the automatic failback feature using the dlnkmgr
command
Use the dlnkmgr command to set up automatic failback.
dlnkmgr set –afb { on [–intvl Interval_Time] | off } [–s]
The dlnkmgr command sets whether automatic failback is used for failed paths.
The default setting is off.
–afb Specify whether or not the the automatic fail-back is used for
failed paths.
on Automatic failback of the failed paths is performed at a
specified interval. The recovered path is returned online.
off Automatic failback is not performed.
–intvl Specify the time interval for automatic failback with a value
between 1 and 1440 (minutes). When no value is set for this
parameter, the value previously set or 1 minute (default) is
used for failback processing.When automatic failback is
newly turned on, or the DLM manager is activated, the first
automatic failback is performed after the duration of the
specified interval.
Settings on automatic failback remain valid after the system is turned off and
restarted. The interval value is maintained even after the automatic failback is
turned off. The stored value is used when automatic failback is set on again and no
value is set for the interval at that time.
Only the paths containing an error are subject to the automatic failback operation.
The paths having an error when the DLM manager is activated are also included in
the automatic failback operation.
With the addition of the auto failback, only normal paths are subject to health
check.
Error indication on the last path
When the state of the paths is indicated with dlnkmgr view –path command, the
last path for a device remains online. It does not go offline even if an error occurs.
The path containing an error is now indicated as Online(E).
■ The Online(E) path returns online if input and output can be successfully
executed.