Compaq StorageWorks HSZ80 Configuration And Cli Reference Manual page 307

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Specify NODESTROY_UNFLUSHABLE_DATA to leave the unwritten data intact in
the failed controller's write-back cache. When the failed controller is replaced and
placed into service, the write-back cache data is flushed to the appropriate devices.
Specify DESTROY_UNFLUSHABLE_DATA to reconfigure the operational
controller before replacing the failed controller. The unwritten data of the failed
controller may reference devices not present in the new configuration. If you do not
destroy the old configuration data, it may conflict with the new configuration and
cause the subsystem to behave unpredictably.
CAUTION: Unflushed data cannot be recovered after it is destroyed.
Example
This example shows how to terminate failover mode between two controllers in a
dual-redundant configuration:
SET NOFAILOVER
See also
SET FAILOVER
SET MULTIBUS_FAILOVER
SET NOMULTIBUS_FAILOVER
Compaq HSZ80 Array Controller ACS Version 8.3 Configuration and CLI Reference Guide