Help with quota problem

[adapter]

Hello,

i have a problem with all my server with RHEL4 or Centos 4.4, when u upload small files on the server the system report a different size, this is a little example

> drwxr-xr-x 2 user user 4096 May 10 11:11 ./
> drwxr-x--- 12 user nobody 4096 May 10 11:16 ../
> -rw-r--r-- 1 user user 7514 May 10 11:11 cred.js

total is about 7+4+4= 15kb

but when i do du -h in the folder

root@ares [/home/user/www/]# du -h
20K

where are this 5kb of difference? i have note that this happend when a site have small files inside, example when u install joomla about 7mb on my server it is 18Mb, the server size block is set to 4kb

[visiox]

Which one are you talking about?

1. Hardware block size, "sector size"
2. Filesystem block size, "block size"
3. Kernel buffer cache block size, "block size"
4. Partition table block size, "cylinder size"

because that can make a big difference