ExtremeTech has compared seven hard drives with a capacity of 1 terabyte: Hitachi A7K1000, Samsung HD103UJ, Seagate 7200.11, Seagate Barraduda ES.2, Western Digital WD10EACS, Western Digital WD1000FYPS and Hitachi 7K1000.
The two drives we look at more closely today are old and new in the market space for terabyte hard drives. The Hitachi A7K1000 is built on the 7K1000 architecture, and represents one of the older families of terabyte drives. Hitachi uses five 200GB platters and ten heads in the A7K1000.
The other is a desktop drive from Samsung: the Spinpoint F series HD103UJ. Samsung's a relatively new player in the global storage market. Their past desktop drives have suffered from somewhat anemic performance, but have garnered a reputation for low noise and power usage. Samsung took aim at the performance issues by building the HD103UJ with just three platters and six heads for a whopping 334GB per platter.
Check out the full review over here. According to the reviewer the best drive is the Samsung Spinpoint F HD103UJ, this HDD performs very well, it's very efficient and has a reasonable price.