Serial ATA External 4 Ports and RAID 0, RAID 1, RAID 0+1, RAID 1+S(Mirrored-Sparing) to your system Item Uses SIlicon Image Chip SIL3114r FEATURES Four shielded and durable eSATA external connectors 48 bits LBA can Break Capacity-Limit to Support HDD larger than 137GB Four high speed Serial ATA interface ports, each supporting 1st generation Serial ATA data rates 1.5Gb/s Hot-plug capability Fully compliant with Serial ATA 1.5G specifications Provides RAID 0 (Stripping) to greatly increase the performance of data transfer by simultaneously writing data to multiple drives Provides RAID 1 (Mirroring) to protect the data from a disk failure by writing identical data on two drives RAID 0+1 (Mirrored-Stripping) combine both Striping and Mirroring technologies to provide both the performance enhancements that come from Striping and the data availability and integrity that comes from Mirroring RAID 1+S (Mirrored-sparing) can automatically replace the failed drive and rebuild the system when booting HDD is failed Supports ATAPI commands Supports Spread Spectrum in receiver Independent 256-byte FIFOs (32 bit * 64 deep) per Serial ATA channel for host reads and writes Compliant with PCI Specification, revision 2.2 Integrated PCI DMA engines Four Pin header on board for LED connection 32 bit, 33/66MHz fully compliant PCI host interface Supports Windows 98, Millennium, NT 4.0, 2000, XP, 2003 and Linux, Novell Netware Acts as NON-RAID when BIOS not configured RAID