is this normal?

[kydew]

is this normal? i have a 2tb seagate barracuda, and its like missing 200gb of storage?

[Prodigy_Smit]

1 minute ago, Rafizia said:

is this normal? i have a 2tb seagate barracuda, and its like missing 200gb of storage?

Yep is normal 

I attached mine 

[Oswin]

perfectly normal, if you are interested, here is an article you can look at

https://www.seagate.com/as/en/support/kb/why-does-my-hard-drive-report-less-capacity-than-indicated-on-the-drives-label-172191en/

 

[Moonzy]

this is because manufacturers of hard disk rate their capacity differently

 

Base 10 calculation: 2 Terabytes = 2 x 10^12 = 2 000 000 000 000 Bytes (which is around 1.81TB in binary)

Base 2 calculation:   2 Terabytes = 2 x 2^40 Bytes = 2 199 023 255 552 Bytes, slightly more than the above

 

in IT, the power of two is used to calculate most things, and coincidentally 2 to the power of multiples of 10 is almost equal to 10 to the power of multiples of 3, so they hitch hiked their system and used K M G T to prefix

 

so manufacturers just use whatever they want and would still be technically right.

 

ie.

2^10 = 1024 = 1 kilobyte

10^3 = 1000 = 1 kilobyte (2.4% diff)

 

2^20 = 1 048 576 = 2 kilobyte

10^6 = 1 000 000 = 2 kilobyte (4.9% diff)

 

2^30 = 1 073 741 824 = 2 megabyte

10^9 = 1 000 000 000 = 2 megabyte (7.4% diff)

[suedseefrucht]

1 hour ago, Moonzy said:

this is because manufacturers of hard disk rate their capacity differently

 

Base 10 calculation: 2 Terabytes = 2 x 10^12 = 2 000 000 000 000 Bytes (which is around 1.81TB in binary)

Base 2 calculation:   2 Terabytes = 2 x 2^40 Bytes = 2 199 023 255 552 Bytes, slightly more than the above

 

in IT, the power of two is used to calculate most things, and coincidentally 2 to the power of multiples of 10 is almost equal to 10 to the power of multiples of 3, so they hitch hiked their system and used K M G T to prefix

 

so manufacturers just use whatever they want and would still be technically right.

 

ie.

2^10 = 1024 = 1 kilobyte

10^3 = 1000 = 1 kilobyte (2.4% diff)

 

2^20 = 1 048 576 = 2 kilobyte

10^6 = 1 000 000 = 2 kilobyte (4.9% diff)

 

2^30 = 1 073 741 824 = 2 megabyte

10^9 = 1 000 000 000 = 2 megabyte (7.4% diff)

The HDD label is in TB (terabyte) like Moonzy's base 10 calculation 1000^4 Bytes.
The Windows capacity is in TiB (tebibyte) like Moonzy's base 2 calculation 1024^4 Bytes.

 

These are two different units.

1 KB is 1000 Bytes, so 1 TB is 1000^4 = 1 000 000 000 000 Bytes

1 KiB is 1024 Bytes, so 1 TiB is 1024^4 = 1 099 511 627 776 Bytes