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Compaq HSZ80 Array Controller ACS Version 8.3 Configuration and CLI Reference Guide
Specify WRITEBACK_CACHE for all new RAIDsets, mirrorsets, and units you want
to take advantage of the controller’s write-back caching feature.
WRITEBACK_CACHE cannot be enabled on units with an underlying
DT_SUPPORT mirrorset container.
Specify NOWRITEBACK_CACHE for units you want to receive data directly from
the host without being cached.
CAUTION: Though there is built-in redundancy to protect data contained
in cache, allowing data to be written to write-back cache may result in
the loss of data if the controller fails.
NOTE: The controller may take up to five minutes to flush data contained within
the write-back cache when you specify the NOWRITEBACK_CACHE switch.
Examples
This example shows how to create unit D102 from a single-disk drive named
DISK10000 and sets the host’s access to the unit through “this controller”:
ADD DISK DISK10000 1 0 0
INITIALIZE DISK10000
ADD UNIT D102 DISK10000 PREFERRED_PATH=THIS_CONTROLLER
This example shows how to create unit D107 from a RAIDset named RAID9 and
instructs the unit to take advantage of the controller’s write-back caching feature.
ADD DISK DISK10100 1 1 0
ADD DISK DISK20100 2 1 0
ADD DISK DISK30100 3 1 0
ADD DISK DISK40100 4 1 0
ADD RAIDSET RAID9 DISK10100 DISK20100 DISK30100 DISK40100
INITIALIZE RAID9
ADD UNIT D107 RAID9 WRITEBACK_CACHE