Western Digital 250GB RE4 Serial ATA II hard disk drive

Western Digital 250GB RE4. Hard drive capacity: 250 GB, Hard drive interface: Serial ATA II, Hard drive speed: 7200 RPM. Power consumption (standby): 0.7 W, Power consumption (read): 7.9 W, Power consumption (write): 7.9 W. Width: 4" (101.6 mm), Height: 1" (25.4 mm), Depth: 5.79" (147 mm). Drive device, transfer rate: 128 MB/s, Operating temperature (T-T): 32 - 140 °F