Xserve RAID: Disable Controller Write Cache when using JBOD mode

You should disable the "Use Controller Write Cache" feature when using an Xserve RAID in JBOD ("Just a Bunch of Disks") mode.

To disable "Use Controller Write Cache"

1. Open Xserve RAID.
2. From the Main menu, choose Settings.
3. Choose Performance.
4. Deselect the "Use Controller Write Cache" option.

Additional information

The Xserve RAID Controller Write Cache queues data before it is written to the disks. In the unlikely event that queued data cannot be written to a hard drive that is a member of an Xserve RAID in JBOD mode, there is a possibility that the data could be lost, unless you disable the "Use Controller Write Cache" feature.