WD Caviar Green 2.5 & 3TB HDDs @ PCPer
“While both Western Digital and Seagate both pushed out their external 3TB solutions a few weeks ago, doing so required them to make changes to their USB bridges (i.e. shifting the sector size to 4kb vs. 512b). Since all other internal drives are expected to use 512b sectors, and so much software is based on that sector size, WD has opted to hold to that standard for the internal Green.”