With Siig SATA RAID 1 Bay Enclosure offers you the capability to write data simultaneously to two hard drives, maintaining a constant mirror of data. # RAID operation implemented at block level, and works with all types of data & drive formats. Connects directly to the host computer via standard Serial ATA interface - no add-on card or extra driver needed. The Siig SATA RAID is the redundant storage solution you've been looking for.