iStarUSA 4U industrial rackmount chassis D Storm D-410-B15SA combines with BPU series to enable hot-swappable storage capability. It also supports up to seven full-length and full-height add-on cards and total storage capacity up to 15 storage drives for RAID configuration. Two 120mm cooling fans on sides provide the best ventilation to prevent critical equipment from heat damage. D-410-B15SA provides server or cluster maximum reliability and performance.