my linux corropt after lvextend!
 

Hi
i did the following step:
1- umount /dev/mapper/VolGroup00-LogVol03
2- lvremove /dev/mapper/VolGroup00-LogVol03
2- lvextend -L 90G /dev/mapper/VolGroup00-LogVol02
-------------------------------
df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
19G 4.2G 14G 25% /
/dev/cciss/c0d0p1 99M 15M 80M 16% /boot
none 2.0G 0 2.0G 0% /dev/shm
/dev/mapper/VolGroup00-LogVol01
19G 7.5G 9.7G 44% /u01
/dev/mapper/VolGroup00-LogVol02
61G 48G 9.8G 83% /u02
/dev/mapper/VolGroup00-LogVol03
98G 6.5G 86G 8% /u03
--------------------------------
after these step i reboot linux..but my linux dosent come up and gives error on cheking filesystem :fsck.ext3 no such file or directory while trying to open /dev/mapper/VolGroup00-LogVol03

what i must do?

I think that you'll need to provide some details so that someone can help you (distro, system architecture, harware, etc.). It might also be helpful if you posted your boot log and the output from

Remove the offending entry from /ets/fstab.

i solved my problem by doing the following steps:
mount / -o remount,rw
vi /etc/fstab
and remove the line which makes wrong.