The 1TB SATA Drive Module for Xserve from Apple is a hot-pluggable spare hard drive for the Xserve. It can be used to add storage to an Xserve that does not have a full complement of drives or to use as a spare drive in the event of a drive failure. System administrators should always have at least one spare drive on hand to minimize downtime in the event of a drive failure.
Expand Xserve storage
Hot-pluggable enclosure
Compatible with Xserve (Early 2009)