iStarUSA 4U industrial rackmount chassis D Storm D-407L-55R8P. It supports up to seven full-length full-height add-on cards and seven 5.25" bays for high density data storage for RAID configurations. Center hot-swappable 120mm fan provides excellent thermal cooling solution. Achieve ultimate uninterrupted operation with support of 550W redundant power supply. D-407L-55R8P provides your server or cluster maximum flexibility and performance.