To enhance the write performance of RAID 5, Intel® Matrix Storage Manager software has implemented a RAID 5 volume write-back cache and coalescer. The volume write-back cache allows writes to be buffered and improves coalescing. The cache is disabled by default, but can be enabled by the user through the Intel® Matrix Storage Console. An Uninterrupted Power Supply (UPS) is recommended for use if the cache is enabled.
but how it performs on raid 0 array??
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it seems that there's an improvement over the default setting. some reports stated that different vendor may produce different performance results with the volume write-back cache enabled. just make sure you have an uninterrupted power supply (UPS) in order to avoid the things we do not want when this feature enabled.
Download install Intel® Matrix Storage Manager, start application and switch Advanced Mode than, find your RAID name at the left on the page in the tree and right click & choose option of Enable Volume Write-Back Cache. Hope it helps. I have done it on ICH9R with my RAID0.