X-bit Labs has compared 3TB hard disk drives from Hitachi, Seagate and Western Digital. You can check out their review over here.
The free space on our computers’ hard disks is getting consumed at a tremendous rate in our never-ending search for higher quality. HD video, 15-megapixel photographs, lossless audio, high-resolution textures of latest games are the reasons why we don’t measure hard disk capacities in just gigabytes anymore. It doesn’t matter if a hard drive has a few gigabytes more or less now that we use the term terabyte to describe it.
After a long period of exponential development hard disk drives have slowed their pace down in the last year and a half. Besides the obvious manufacturing difficulties, the problem is that moving beyond the 2-terabyte barrier is not as easy as it seems.