Western Digital (WD), seems to have matched rival Seagate's per-platter storage density mark, with its 500GB platter technology. What's more, WD is planning to release a quad-platter hard drive totaling two terabytes of unformatted capacity before Seagate could achieve that feat with its Barracuda 7200.12 series. Seagate was the first to come out with a 1.5TB hard drive with four 375GB platters.
The 2TB hard drive by WD (model: WD20EADS) lists under the company's Caviar Green series. It makes use of a 32 MB cache. Its access time is rated at 8.9ms, though its spindle speed is variable, between 5400 and 7200 rpm. The variable speed brings in power savings. It uses the standard SATA II interface.