file size output mismatch

["Adil Mujeeb" <mujeeb.adil@xxxxxxxxx>]

Hi All,

 

This is not actually kernel problem, but I thought of discussing this here.

 

I have created a 2 GB file through a script, but i see the size of the file through ls and du commands it is reporting different size.

 

for example:

adil@test:~> file test
test: character Computer Graphics Metafile

adil@test:~> ls -l test
-rw-r--r-- 1 adil group 2147483648 2007-09-24 23:51 test
adil@test:~> du -b test
2147483648      test

 

The above output is OK.

 

but when I do:

adil@test:~> ls -lh test
-rw-r--r-- 1 adil group 2.0G 2007-09-24 23:51 test
adil@test:~> du -h test
2.1G    test   <--------------------- why it is showing 2.1 GB

 

I could not understand this difference. Could anybody explain this behavioour?

 

The machine is SLES10 x86_64

 

Rgds,

Adil