36x (24 front + 12 rear) 3.5" hot-swap SAS/SATA drive bays supporting SAS3/2 or SATA3 HDDs with 12Gbps throughput Optional rear 2.5" removable HDD Redundant 1280W Platinum Level (1+1) power supplies with PMBus 7x low-profile expansion slots; 7x 8cm (middle) hot-swap cooling fans and adjustable air shroud E1C: Single SAS3 (12Gbps) expander backplane; E2C: Dual SAS3 (12Gbps) expanders backplane Mini SAS HD (SFF 8643) connectivity on backplane Palletized packaging for easy shipping and handling