HP Smart Array 642 Controller

HP Smart Array 642 Controller ... hardware-based fault tolerance. Utilizing both SCSI channels (1 internal and 1 external) of the SA-642 allows you to configure up to 20 hard drives (6 internal, 14 external) to store up to 2.9TB of storage per PCI slot. The SA-642 provides high reliability and increased performance over the Smart Array 532, thus providing excellent value and lowering the total server ownership cost. In addition, the SA-642 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. The Smart Array 642 Controller provides ProLiant DL and ML servers with an entry-level hardware RAID protection for OS and log files, where hardware RAID is needed at an entry-level price point.