cannot force kill using kill -9
 

i used mkfs.ext3 to format a logical volume but it hang.

i pressed ctrl-c but no luck.

i closed the terminal and used another terminal to kill the process without luck.

pls advise.

It's probably in uninterruptible sleep and the only way to kill it is to reboot. Run:
and look for a mkfs process in state D (or others in that state)