PCI -X dual SCSI channel PCI array controller for entry level hardware-based fault tolerance. Utilizing a SCSI channel (1 internal) of the SA-641 allows you to configure up to 6 internal hard drives to store up to 880.8 GB of storage. The SA-641 provides high reliability and increased performance over the LC2 controller, thus providing excellent value and lowering the total server ownership cost. In addition, the SA-641 is data compatible with all Ultra 320, Wide Ultra3 and Wide Ultra2 drives, offering an unparalleled degree of investment protection. Designed and integrated with HP entry-level and workgroup ProLiant servers, this product provides worry-free data protection.