HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software Command Line Interface Reference Guide (EK-G80CL-RA. C01, March 2005)

CLI Command Descriptions
101HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software
Command Line Interface Reference Guide
data-retention-policy
Instructs the controller how to handle writeback cached data:
■ Specify NODESTROY_UNFLUSHED_DATA to retain the cached data and
discard controller information. The controller metadata synchronizes with
the cache module data and preserves any unwritten data for eventual
flushing to the disk array.
Caution: Because unintentional misuse of this command can cause data loss,
both the command and the DESTROY_UNFLUSHED_DATA switch or the
NODESTROY_UNFLUSHED_DATA switch must be entered in their entirety.
They cannot be abbreviated.
Specify NODESTROY_UNFLUSHED_DATA if:
— The controller module is replaced.
— The controller nonvolatile memory (NVMEM) contents are lost.
Specify DESTROY_UNFLUSHED_DATA parameter if used to retain the
controller information and discard unwritten cache data in the following
situations:
— If the cache module is replaced.
— Any other reason not listed above.
Caution: Specifying the DESTROY_UNFLUSHED_DATA parameter destroys
data remaining in cache, which can result in data loss.
Switches
There are no switches associated with this command.
Examples
To clear an invalid cache error on “this controller” after replacing a controller
module, enter the following command on one line:
CLEAR_ERRORS THIS_CONTROLLER INVALID_CACHE
NODESTROY_UNFLUSHED_DATA