Western Digital recently began to ship a new series of Caviar hard drives that included the company's Advanced Format technology. The new Caviar Green models are nearly identical to their standard brethren, but offer double the cache (64MB instead of 32MB at 1-2TB) and have a different model number. A WD10EARS is an Advanced Format drive; a WD10-EADS is a 'normal' drive. WD isn't marketing Advanced Format much at the moment, but it's important to understand what the technology is and how it works, particularly if you're still running Windows XP...

WD 1TB Caviar Green Hard Drive w/ Advanced Format