The 5400 RPM Traditional western Digital WD20EADS Caviar 2 Terabyte generate was released in January 2009 and utilizes "Green Technology" to control operating charges while delivering superb performance at unknown capacities. All Traditional western Digital desktop pushes are based on SATA/300 interfaces together with NCQ, and those with sizes of 1 TB or more possess 32 MB storage cache. Western Digital carries a very good limited extended warranty service, and for this particular "green" model is 36 months from date associated with manufacture (not the actual date of invest in as with most drive suppliers) and they track these people through their Extended warranty Status Check program. - Business Crucial RAID Environments - WD Caviar Natural Hard Drives are not suitable for and are not guaranteed for use in RAID situations utilizing Enterprise HBAs and/or expanders as well as in multi-bay chassis, as they are not really designed for, nor analyzed in, these distinct types of RAID applications. The particular WD20EADS is a one of WD's GreenPower-branded devices, complete with IntelliPower motor command which means that some devices in the product range could possibly have a rotational velocity of 5400pm while others may well operate at as much as 7200rpm.