HP Rack Storage from Hewlett-Packard is highly available and scalable mass storage solution for HP NetServers with investment protection. This rack features industry-leading storage density, supports low-profile hot-swap disk drives, hot-swappable power supplies, cooling fans and redundant power cords. HP NetServer Rack Storage 12 offers new levels of high availability with dual hot-swap SCSI cards. It features extremely dense 3U enclosure and allows for easy card upgrade to Fiber Channel.