S2911 Server Case Specifications all indicators for clear system status. backplane alarm for over-temperature and fans failure. optional for SCSI,SATA,SAS backplane for hot-swapping nine sets of non-hot-swap HDD holders, providing enough space for storage expansion. M/B 12"X13" in max and all dimensions of ATX 2U and Redundant P/S. PCI expansion-slot provides 3 full-height or 5 half-height locations. fluid dynamic theory based heat removal system ensures the efficiency. 1.0 mm SECC housing material with exquisite techniques and secure structure Hi-attached and hi-strength painting makes peel and bubble-proof