Apple xServe Raid Card Serial interface cards/adapter

xServe Raid Card, 512MB The Xserve RAID Card delivers enhanced storage performance and data protection through a powerful hardware RAID engine, 512MB of cache, and an integrated 72-hour battery for protecting cache data. The card requires Mac OS X Server v10.5 or later and replaces the built-in SATA/SAS controller board in your Xserve.

Enhance storage performance and data protection by configuring your system with the Xserve RAID Card and multiple SAS or SATA hard drives. The Xserve RAID Card replaces the built-in SATA/SAS controller board and does not use a PCI Express slot. Please note that your Xserve must have either all SATA or all SAS drives in drive bays 1 through 3.
Coupled with two or more hard drives, the Xserve RAID Card offers improved performance and data protection to your Xserve system — up to 497MB/s in RAID 0 and 330MB/s in RAID 5 of sequential read performance. This hardware RAID option supports RAID levels 0, 1, 5, and Enhanced JBOD and has 512MB of cache. It features an integrated 72-hour battery backup for protecting the RAID cache. The card replaces the built-in SATA/SAS controller and does not use a PCI Express slot.