On September 1st, 2009, Western Digital announced two new 2 TB hard drives that belong in the Caviar Black and RE4 series, which are 3.5" hard drives that feature four 500 GB platters. The WD Caviar Black 2 TB (model WD2001FASS) and WD RE4 2 TB (model WD2003FYYS) hard drives feature 7200 RPM spin speed, 64 MB cache, dual stage actuator technology, SATA 3 gigabits per second (GB/s) interface, and an integrated dual processor to deliver ultimate performance in a maximum-capacity drive. WD’s RE4 2 TB drive is designed for enterprise-class applications, so we won't be looking at that one today. We will be looking at the brand new WD Caviar Black 2 TB (model WD2001FASS) hard drive and will be comparing it to the WD Caviar Green 2 TB (model WD20EADS) hard drive.