The Adaptec 2410SA Enclosure Kit is a fully tested, fully supported, hot-swappable Serial ATA RAID solution that includes an Adaptec Serial ATA 2410SA RAID controller, internal 4-bay hot-swappable drive chassis, cables, and Adaptec's Storage Manager - Browser Edition management software. Among the product's key differentiating features include its SATA enclosure management and ability to flash a failed drive LED light, and the fact that it supports the same Advanced RAID features set offered in Adaptec traditional U320 SCSI RAID controller line - including Online Capacity Expansion, RAID Level Migration, and optimized disk utilization. Add it all up and you have an ideal solution for workstations and servers requiring RAID protection at a low price.