3Ware 9550SXU16MLB10 User Guide - Page 22

Introducing the 3ware 9000 Series Controller „ Scheduled Background Tasks. Initialize, rebuild, verify, and self-test tasks can all be run in the background, at scheduled times. This lets you choose a time for these tasks to be run when it will be least disruptive to your system. You can also define the rate at which background tasks are performed, specifying whether I/O tasks should be given more processing time, or background rebuild and verify tasks should be given more processing time. „ Write Cache. Write cache can be enabled or disabled using 3BM, 3DM2 and CLI. When write cache is enabled, data will be stored in system cache, 3ware controller cache, and drive cache before the data is committed to disk. This allows the system to process multiple write commands at the same time, thus improving performance. However when data is stored in cache, it could be lost if a power failure occurred. With a Battery Backup Unit (BBU) installed, the cache stored on the 3ware controller can be restored. For more information, see "Updating the 3ware Driver Under Windows XP" on page 146. 16 3ware 9000 Series Serial ATA RAID Controller User Guide