The StarTech.com PCI Ultra ATA/100 IDE RAID Controller Card provides an inexpensive way for users to increase the speed or fault-tolerance of their PC. RAID levels 0 (striping), 1 (mirroring) and 0+1 (mirroring a stripe set) are supported on up to 4 IDE drives. The card supports Ultra ATA/100 hard drives for maximum performance, but is also compatible with older drives. This card is the perfect solution for adding the redundancy of mirroring to small business file servers, or improving the drive speed on workstations with striping.