The FastTrak S150 SX4 Serial ATA RAID PCI adapter delivers industry-leading RAID 5 performance at an unprecedented performance-to-price ratio. For companies running popular applications like web services, file/email servers, audio/video streaming and near line storage, the FastTrak S150 SX4 opens the world of professional RAID 5 performance and data protection and combines it with cost-effective Serial ATA (SATA) drives for the ultimate internal storage solution. Based on OEM-proven RAID 5 technology, the FastTrak S150 SX4 competes with SCSI RAID 5 controllers - at one-half to one-third of the price. RAID 5 storage protection is no longer the privilege of budget-rich IT departments. RAID 5 implementation involves striping data and parity information (XOR) across the storage array. Since those parity calculations are so processor-intensive, RAID 5 controllers traditionally require a dedicated CPU to perform the XOR calculations and manage the array. Instead of adding a costly CPU to the controller, Promise's FastTrak S150 SX4 controller uses an integrated XOR engine for parity calculations, delivering extraordinary performance at a dramatically lower price. This approach takes advantage of today's ultra-powerful PC CPUs to manage the array and outperform traditional RAID 5 solutions. The FastTrak S150 SX4 sets a new standard for RAID 5 controllers.