Sure , will keep monitoring it regularly.
Thank you very much for your help and support SAM...........

So Is there any way to figure it out , so that i can take necessary steps for the next time..

And please find the output of this without The external Hdd

root@trvbackup [~]# du -smx /var/* 2> /dev/null | sort -n | tail -n 5
4 /var/tmp
30 /var/cache
377 /var/cpanel
5323 /var/log
17030 /var/lib
root@trvbackup [~]#

As soon as i un mounded the External hdd ., i tried df -h
and got the output..........

root@trvbackup [~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_trvbackup-lv_root
50G 28G 19G 60% /
tmpfs 3.9G 0 3.9G 0% /dev/shm
/dev/sda1 485M 53M 407M 12% /boot
/dev/mapper/vg_trvbackup-lv_home
402G 145G 236G 39% /home
/usr/tmpDSK 1.6G 38M 1.5G 3% /tmp

That means 19 gb free as soon as i unmounted my External Hdd.

Hi Sam,

I had mounted a 2 TB hdd on my server, when i had this issue ...
@ arround 10 Am IST server got stuck. And i started building new one ...................Removed the HDD and mounted to the new one.

Hi SAM,

since the server was down , i had to install and configure a new one. i will come back as soon as the temperory issues are sorted out .

root@trvbackup [/home]# du -smx * | sort -n

right ?

root@trvbackup [/]# du -smx * | sort -n
du: cannot access proc/11877/task/11877/fd/4': No such file or directory du: cannot access proc/11877/task/11877/fdinfo/4': No such file or directory
du: cannot access proc/11877/fd/4': No such file or directory du: cannot access proc/11877/fdinfo/4': No such file or directory
0 proc
0 scripts
0 sys
1 backup
1 dev
1 lost+found
1 media
1 mnt
1 quota.user
1 razor-agent.log
1 selinux
1 srv
3 tmp
7 bin
8 root
14 sbin
29 etc
30 lib64
38 opt
43 boot
234 lib
5401 usr
17480 var
148041 home

Boss.....Still waiting for the output.......

root@trvbackup [/]# du -smx * | sort -n
^C
root@trvbackup [/]#

Waited arround half an hour ...but no output ....still waiting

sure .........working on it .thanks for the quick response......:)

trying on it......

root@trvbackup [~]# du -smx * | sort -n
1 anaconda-ks.cfg
1 CHANGELOG
1 cpanel3-skel
1 installer.lock
1 install.log
1 install.log.syslog
1 install.sh
1 latest
1 LICENSE
1 php.ini.new
1 php.ini.orig
1 public_ftp
1 public_html
1 README
1 scripts
1 tmp
3 csf

du -shx /*

out put keeps on counting .........

36K     /backup
6.4M    /bin
43M     /boot
772K    /dev
29M     /etc

and so onn

df -h

Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/vg_trvbackup-lv_root
                       50G   48G     0 100% /
tmpfs                 3.9G     0  3.9G   0% /dev/shm
/dev/sda1             485M   53M  407M  12% /boot
/dev/mapper/vg_trvbackup-lv_home
                      402G  145G  236G  39% /home
/usr/tmpDSK           1.6G   37M  1.5G   3% /tmp
/dev/sdb1             1.5T  286G  1.2T  20% /backup/current
/dev/sdb2             322G  211G   96G  69% /backup/archive

so

I have a CentOS server , from past one week i found out that its disc space have been full. cant identify whats using the space in the root folder.

Got a cent OS test server , Its disc space is getting filled up. dont know whats eating up the space ....any options to find out the culprit

Thanks, actually i was in a problem , hope gets a solution from here............:)

His name is ambi , from india