250Gb why acronis sees it like a 232Gb

Hi
i use acronis 10 last build

i did notice that it sees my hd like a 232gb and not a 250gb

why?
in the bios , it detect a 250 gb
thanks

 

A 250Gb HD is 232Gb when formatted.

 

thanks MrMajestic

sorry for my ignorance

can i format in a different way / with different file system to acquire the remain space?

 

Actually, this is due to decimal versus binary capacity calculations. 250,000,000,000 bytes, converted on a decimal basis to giga (divide by (10^3)^3 = 10^9) bytes is 250 GB, while covverted on a binary basis to giga (divide by (2^10)^3 = 1024^3 = 1,073,741,824) bytes is 232.8 GB. Just a different count metric at work here, there's no space to recover. Software generally uses the binary method. Note, this is different from file size versus space occuppied on disk which reflects the allocation unit size employed, the default which depends on volume size.

Blue

 

thanks Blue

sorry mate i did not understand , can u do an example?

 

if ur hard drive uses 4kb clusters, and u save a 2kb file, then 2kb will be wasted. correct me if im wrong

 

sorry but i'm a novice

WSFuser ,in the format what kind of k clusters should i use?

 

the example i gave was imaginary, cluster size is actually in bytes not KB. anyways, if u have mostly small files then ud want smaller cluster size and if ur disk is filled with larger files then ud want ur cluster size to be bigger. i just use the default.

http://img74.imageshack.us/img74/7516/format6le.jpg

 

What Blue told us is that your HD vendor is trying to fool you.
It's not really a problem as every disk vendor is doing that


The problem is that people who come ut with a binnary system just saw that

2^10 = 1024
So the would call 1024 bit as one Kb

The same ... 2^20 = 1048576
This is called in binary one GB

when your hardware vendor sell you one GB of HD they sell you
1 000 000 byte and not 1 048 576


This is why you see the difference.
It's a matter of naming.
A GB is not the same as a GB ...
Depending if it's a software or hardware that tell you the capacity.

(Note... i may have done bad calation ... but i hope you get the idea)