3T HDD expected to lose so much capacity after format?

[whomiask]

Hi,

I use to get 2T HDD to run my PCs whether Win 7 or XP I don worry about the size issue. Lately I bought a 3T HDD for my NAS. Thinking I have much capacity to use but after the NAS formatted the HDD, it only has 2.7T. I lost almost 290G of capacity. I wonder if I divide 2 partitions of each 1.5T, I shall have a lesser lost of capacity. Is it true? Or I expected too much?

[BenDataRecovery]

This is how manufactures calculate:

3 x 1000 x 1000 x 1000 x 1000 = 3 000 000 000 000 bytes = 3,00 TB when you use 1000 as a multiplier

This is how the operating system calculates ( to use 1024 as a multipier or in that case as a divider):

3 000 000 000 000 bytes / 1024 / 1024 / 1024 / 1024 = 2,72 TB

This is the closest explanation I can give you out of my mind.

edit: Nothing wrong with your drive. Only two different viewpoints of calculating. In my opinion somehow a marketing trick. Isn't it that way?

[BenDataRecovery]

Here a good explanation:

Not that I wanted to give any recommendations for Seagate Drives...

http://knowledge.seagate.com/articles/en_US/FAQ/172191en

[whomiask]

Dear all,

Ya.. indeed the manufacturers' own term. So I just want to know if I divide the 3T HDD in to 1.5T x 2, will it has the lesser lost of the capacity? Does this theory work?

[jermy]

3 TB / 2 = 1.5 TB (Terabyte) = 1.364 TiB (Tebibyte)

[whomiask]

So there is really has no advantage if I divided the 3T to 2 section of 1.5T, I still lost almost the same capacity that I lost in a single drive.

[jermy]

you don't get it I suppose, you don't lose anything because it wasn't there in the first place
The size of your HDD is 3TB and not 3TiB (never was and never be 3TiB)

[fzabkar]

So there is really has no advantage if I divided the 3T to 2 section of 1.5T, I still lost almost the same capacity that I lost in a single drive. :shock:

Is 1 kilometre equal to 1000 metres or 1024 metres?

[jermy]

Is 1 kilometre equal to 1000 metres or 1024 metres?

:like:

[whomiask]

Ya.. Just don like the "lost" of it, it's equal I paid more $$ but don get what I want..