PCI Host Adapter can upgrade your desktop computer to have two Serial ATA Channels. The board provides a 32bit 33/66 MHz PCI interface on the host side and dual fully compliant Serial ATA ports on the device side to access Serial ATA mobile external storage devices such as hard disk drive ZIP drive CD-ROM CD-RW DVD-ROM. RAID 0 (Striping) RAID 1 (Mirroring) can improve the data performance or provide the data redundancy and rebuilding. Features Two shielded and durable eSATA connectors 48 bits LBA can Break Capacity-Limit to Support HDD larger than 137GB Sufficient power current 1.5A 5V and 2A12V to supply External Device Hot-plug capability Two high speed Native Serial ATA interface ports each supporting 1st generation Serial ATA data rates 1.5G b/s 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 2 drives Two Pin header on board for LED connection 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 2.3 3 Integrated PCI DMA engines 32 bit 33/66MHz fully compliant PCI host interface