The ARECA Serial ATA RAID host adapter is a high-performance PCI-X bus to SATA Disk Array host adapter. They can provide up to 4,8,12 or 16 SATA peripheral devices on a single host adapter. When properly configured, the SATA host adapter can provide non-stop service with a high degree of fault tolerance through the use of RAID technology and advanced array management features. It is used the same RAID kernel of its field-proven external RAID controller. -256MB on-board DDR333 SDRAM with ECC protection(4/8-port). Windows 2000/XP/Server 2003 Redhat Linux, SuSE Linux and Mandrake FreeBSD 5.3 - i386 FreeBSD 5.3 - AMD64 (X86-64) RedHat Linux Fedora Code 3 - i386 RedHat Linux Fedora Code 3 - X86-64