So far only two 2 TB hard disk drives have reached the market and both are “green” models, meaning they rotate at lower speeds in order to save energy. Models spinning at 7,200 rpm will reach the market only by the end of the year (it is more complicated to build a 7,200 rpm 2 TB drive than a 5,400 rpm one) and they will be faster than these two models we are reviewing today. Let’s compare the performance of Seagate Barracuda LP with Western Digital Caviar Green.

Seagate Barracuda LP spins at 5,900 rpm, while Western Digital does not disclosure the rotational speed from Caviar Green (5,400 rpm is our educated guess). Hard drives typically consume between 8-10 W; “green” models like the two we are going to compare consume practically half of this.

Both 2 TB models we tested have a real capacity of 1.82 TB or 1,863 GB (3,907,029,168 sectors). As you may be aware, the capacity advertised by hard disk drive manufacturers isn’t the real drive capacity. Read our Hard Disk Drives Capacity Limits tutorial for further information on this subject.

Here is a summary of the two hard drives we are going to compare:

Manufacturer Model Model # Buffer Price
Seagate Barracuda LP ST32000542AS 32 MB USD 239.99
Western Digital Caviar Green WD20EADS 32 MB USD 239.99

Prices were reasearched at on the day we published this review.

Now let’s see which drive is the fastest 2 TB product.


Gabriel Torres is a Brazilian best-selling ICT expert, with 24 books published. He started his online career in 1996, when he launched Clube do Hardware, which is one of the oldest and largest websites about technology in Brazil. He created Hardware Secrets in 1999 to expand his knowledge outside his home country.