HP Array Controller HSG V8.7 Software - Manual (Page 401)

CLI Commands B–129
SET NOFAILOVER
Reconfigures both controllers to operate in a non-dual-redundant (non-
failover) configuration. Immediately after entering this command,
remove one controller from the shelf because the sharing of devices is
not supported by nonredundant controllers.
Note SET NOFAILOVER and SET NOMULTIBUS_FAILOVER
have the same effect. Either command exits from transparent or
multiple bus failover mode.
It is recommended that both controllers be present when this command
is carried out. Otherwise, the controllers become misconfigured with
each other, requiring additional steps later to allow the “other
controller” to be configured for failover.
This command affects both controllers, regardless of the controller on
which the command is carried out. All units accessed through the
“other controller” failover to “this controller” and the “other controller”
is shut down. No configuration information is lost when the SET
NOFAILOVER command is carried out.
Syntax
SET NOFAILOVER
Switches
DESTROY_UNFLUSHABLE_DATA
NODESTROY_UNFLUSHABLE_DATA (Default)
Instructs the controller how to handle data contained within write-back
cache. These switches have no effect if both controllers are operational.
Select one of these switches to indicate how the controller is to handle
data contained in cache if one of the controllers fails before it can
properly shut down with the SET NOFAILOVER or SHUTDOWN
commands.
Under some circumstances, the data in a failed controller’s write-back
cache may not fail over to the operating controller’s write-back cache.
For example, cache data will not failover if the operating controller has
a failed cache battery because of the risk of data loss if the power is
interrupted.