Starting with this release, READ/WRITE FPDMA QUEUED commands are supported. There is a considerable performance enhancement when performing I/O operations using the Marvell driver under specific work load conditions. Other workloads benefit to a smaller degree. The Sun Branded Hitachi 250GB HDS7225SBSUN250G drives have considerably better performance with larger writes using this feature.
There is also significant performance enhancement under many workloads for drives that support this optional portion of the SATA specification.