Specifications

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Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide
WRITE_PROTECT
NOWRITE_PROTECT (Default)
Tells the controller whether data contained on the unit can be overwritten.
Specify WRITE_PROTECT to prevent the host from writing data to the unit.
However, the controller may still write to a write-protected RAIDset to complete a
reconstruct operation and metadata, reconstruct data, and copy data may still be
written to RAIDsets and mirrorsets.
Specify NOWRITE_PROTECT to allow the host to write data to the unit. This allows
the controller to overwrite existing data. NOWRITE_PROTECT is the default for
transportable disks.
WRITEBACK_CACHE (Default)
NOWRITEBACK_CACHE
Enable or disable the write-back data caching function of the controller. The
controller’s write-back caching feature improves write performance.
WRITEBACK_CACHE is the default on transportable disks.
Specify WRITEBACK_CACHE for all new RAIDsets, mirrorsets, and units you want
to take advantage of the controller’s write-back caching feature.
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 a catastrophic subsystem failure occurs.
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.