Cisco Ucs-hd900g15k12n=, Hot-swap hard drive, FF 2.5" SFF, Serial Attached SCSI 3, 900 GB, Spindle Speed 15000 revolutions per minute, Bay 2.5" SFF, Self-Encrypting Drive (SED). Get optimized data storage performance with the Cisco Hard Drive. It has a capacity of 900 GB and runs on a 12 Gb/s SAS interface. This hot-swappable hard drive has a spindle speed of 15000 RPM.