Western Digital's Caviar Green line of hard drives offer amazing capacities along with quiet operation and comparatively low energy consumption. These make excellent drives for storing lots of data, or in systems where noise level and drive space are both equally important. Some speed is sacrificed in order to lower the noise level, though, so for applications where transfer rates or latency is more valuable look to the faster Black series drives.

An update to the Green line, marked by drives with 'EARX' in the model number, supports the SATA 6Gbps interface standard - as well as previously increased cache sizes and optimizations for speed on operating systems like Windows Vista and 7.