WD Red The right choice! No other drive is designed specifically for home and small office NAS systems. Exclusive NASware technology. Our exclusive technology, NASware™, makes WD Red thrive in the demanding small-NAS environment. Energy efficient and money saving. We keep power consumption low which keeps your NAS system happy and your wallet, too. WD Red 2 TB Hard Drive for NAS ( WD20EFRX) Product Specifications Interface SATA 6 Gb/s Performance Specifications Rotational Speed IntelliPower * Buffer Size 64 MB Transfer Rates Buffer To Host (Serial ATA) 6 Gb/s (Max) Physical Specifications Formatted Capacity 2,000,398 MB Capacity 2 TB User Sectors Per Drive 3,907,029,168 Performance Specifications Target Performance MTBF 1,000,000 hours Physical Dimensions English Height 1.028 Inches Depth 5.787 Inches Width 4.00 Inches Weight 1.40 Pounds Metric Height 26.1 mm Depth 147 mm Width 101.6 mm Weight 0.635 kg Environmental Specifications Shock Operating Shock (Read) 65G, 2 ms Non-operating Shock 250G, 2 ms Acoustics Idle Mode 23 dBA (average) Seek Mode 0 24 dBA (average) Temperature (English) Operating 32° F to 158° F Non-operating -40° F to 158° F Temperature (Metric) Operating -0° C to 70° C Non-operating -40° C to 70° C Humidity Operating 5-95% RH non-condensing Vibration Operating 0.004 g²/Hz (10 to 300 Hz) Non-operating 0.05 g²/Hz (10 to 300 Hz) Operating Linear 20-300 Hz, 0.75G (0 to peak) Electrical Specifications Current Requirements 12 VDC Read/Write 250 mA Idle 230 mA Standby 7 mA Sleep 7 mA 5 VDC Read/Write 280 mA Idle 260 mA Standby 105 mA Sleep 105 mA Power Dissipation Read/Write 4.40 Watts Idle 4.10 Watts Standby 0.60 Watts Sleep 0.60 Watts As used for storage capacity, one megabyte (MB) = one million bytes, one gigabyte (GB) = one billion bytes, and one terabyte (TB) = one trillion bytes. Total accessible capacity varies depending on operating environment. As used for buffer or cache, one megabyte (MB) = 1,048,576 bytes. As used for transfer rate or interface, megabyte per second (MB/s) = one million bytes per second, megabit per second (Mb/s) = one million bits per second, and gigabit per second (Gb/s) = one billion bits per second.