ST2760 is a internal JBOD module, which supports two 2.5� SATA hard drive, you can store the operating system and data file in different hard drive or use it with a RAID card. It is designed to has the same dimension as one 3.5� hard drive or one floppy size, this allows you to install ST2760 in the mini-Server, Surveillance Server, 1U Server, eMail Server and POS System that has limited space. ST2760 can help you to save the problem of requiring larger capacity but with limited space. Model No ST2760-2S-S2 Drive Bay 3.5" Floppy DriveBay Drive Fit 2.5" SATA III HDD x 2 (9.5mm thickness) RAID Level JBOD Host Interface SATA III Connector (7Pin) x2 Power Supply SATA Connector (15Pin) HDD Access Indicator LED Color Matt Black Structure Metal Body Dimensions 101.7W x 147L x 25.8H(mm) Weight 0.4(kg) Certifications CE & FCC Operating System Support Windows, Linux Packing Content Accessory Kit HDD Capacity Single HDD tested up to 2TB Operating temperature 32° to 104° F (0° to 40° C) Storage temperature -4° to 116° F (-20° to 47° C) Relative humidity 5% to 95% noncondensing