The Areca ARC-1200 SATA RAID Controller is a PCI-Express x1 bus to SATA Disk Array host adapter. It provides two SATA ll ports on a single controller. It is used the same RAID kernel of its field-proven external RAID controller. When properly configured, the SATA RAID adapter can provide a high degree of performance and fault tolerance with data mirroring for maximum protection. The ARC-1200 is the industry's most compelling PCIe x1 to SATA ll RAID solution which economically delivers full-featured true hardware RAID to desktop and workstations as well as entry-level servers.