iStarUSA 4U industrial rackmount chassis D Storm Economy D-406L-EC. Combine with BPU or T Series enable hot-swappable JBOD and RAID configuration. It also supports up to seven full-length full-height add-on cards. Total capacity up to 3.5" x12 or 2.5" x36 HDD drives for high density data storage. Center hot-swappable 120mm fan provides excellent thermal cooling solution. Achieve ultimate uninterrupted operation with support of iStarUSA redundant power supply. D-406L-EC provides your server or cluster maximum flexibility and performance.