Apple Mac Pro RAID Card The Mac Pro RAID Card delivers enhanced storage performance and data protectionthrough a powerful hardware RAID engine, 512MB ofcache, and an integrated 72-hour battery for protecting cache data. The card occupies the top PCI Express slot (slot 4) of your Mac Pro (early 2009) and requires Mac OS X v10.5.6 or later. Features: * Ideal for video and creative professionals with demanding storage needs as well as for tower server applications, this hardware RAID option supports RAID levels 0, 1, 5, 0+1, and Enhanced JBOD. * It has 512MB of cache and an integrated 72-hour battery for protecting the RAID cache. *The card occupies the top PCI Express slot (slot 4) and connects to the four internal drive bays.