Why it shows 152 GB instead of 160 GB?

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A

Aanand

Journeyman
Though I bought a HDD with 160 GB capacity it shows only 152 GB. What could have happened to the remaining 8 GB? It shows 160 GB in the BIOS.
 
Kniwor

Kniwor

Learner
ok (160*1000)/1024 = 156.25 Gb....

So where is the extra 4.25Gb...

Actually there are 2 reasons...
one is that which is stated above...

another is ur filesystem.... everyfilesystem has some header etc as i believe... so i dont think entire space is usable... but that's my interpretation...
 
S

sakumar79

Technomancer
Actually, you should be calculating 160*1000*1000/1024/1024=152.587890625 because HDD makes also consider 1KB as 1000Bytes... whereas in Windows 1KB=1024 bytes... the 1024 is actually used because it is 2 raised to the power of 10... HDD manufacturers make use of the fact that it is close to 1000.


Arun
 
S

shwetanshu

Cyborg Agent
@skumar said it right, i thought that if i just mentioned that it wud have helped, gues i shud have explained full procedure
 
I

ishaan

Padawan
shwetanshu is rite about the 1000 and 1024 thing..but dont only calculate 1024 mb,,,even the kbs and bytes are 1024 wich they rite as 1000 so u gotta calculate rite from d BITS

but SONY is cool...if u buy memory sticks, etc and u read the box, it says how much actual memory u get...like according to 1024..
 
Kniwor

Kniwor

Learner
sakumar79 said:
Actually, you should be calculating 160*1000*1000/1024/1024=152.587890625 because HDD makes also consider 1KB as 1000Bytes... whereas in Windows 1KB=1024 bytes... the 1024 is actually used because it is 2 raised to the power of 10... HDD manufacturers make use of the fact that it is close to 1000.


Arun
Click to expand...

wow... thanks...

I was thinking that the headers are created after the partition is formatted and was a bit confused and hence added that it was what i thought...

anyhow thanks....
 
T

theraven

Technomancer
ishaan buddy u dun have to calculate from the bits
only from the bytes => kB
since 8 bits is one byte and thats standard both for manufactures and windows ;)
 
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