Backplane support for 24 port SAS / SATA drives and 12 Gb/s Mini-SAS HD SFF-8643 + SGPIO Supports twenty-four 2.5'/3.5' SAS/SATA HDD/SSD hot-swap trays Ball bearing sliding rail included for simple server rack integration Includes three 120mm x 38mm hot-swappable PWM fans Auto lock handle for convenient fixation of chassis into rack cabinet Supports ATX (PS2) / mini-redundant PSU/2U redundant[1] Supports E-ATX or SSI-EEB motherboards Supports 7 standard PCI / PCIe slots Independent drive status LED