BP-SAC2131B is a high-end, large capacity data backup systemdesigned to hold up to three 3.5 SATA or SAS Hard Drives. Its aluminumhousing and 80mm rear cooling fan keeps the unit function at itsoptimal capacity. It is an ideal solution for internal server RAID andJBOD applications. It supports SATA and SAS drives with data transferrates of up to 3G and 6G respectively. Its unique design strategicallyutilizes only two 5.25 drive bay slots to house three 3.5 drives formaximum space-saving. Multiple LED indicators show the power, fanstatus and individual drives activity. Parallel connection to otherSAS devices is not applicable. (SAS raid control function require 4 ormore SAS HDDs. No HDD minimum limitation on SATA raid control function.)