The iStarUSA 4U industrial rackmount chassis D Storm D-400-7P. Combine with BPU or T Series enable hot-swappable storage capability. It also supports up to seven add-on cards and total storage capacity up to 9 storage drives for 1/0/5 raid configuration. D-400-7P provide your server or cluster maximum reliability and performance. Optional Aluminum Body reduces total chassis weight and also provides enhanced thermal cooling solution.