Hi Chang,
Yes. There are processes associated with that filesystem. For ex., do 'ps -ef |grep 25719|grep -v grep' and you will see the process corresponding to the pid 25719.
You will have to completely stop all the application process and let your users logoff or come out of the directories underneath /det/opt/det11.
(Just as a side note, you cannot unmount some of the system directories like /opt,/tmp,/var,/usr. You will have to do them in single user mode. ANd it's not easy to extend /stand, / and primary swap even in single user mode.)
If you are sure that the application is stopped and if you still see processes, then you can kill them using 'fuser itself'. For ex., find the LV corresponding to /det/opt/det11
bdf /det/opt/det11 (note the first column). Say it /dev/vgxx/lvolx. do
#fuser -u /dev/vgxx/lvolx.
For all the PIDs printed (remove the letters from the pids for ex., for 25719co, 25719 is the pid) do a 'ps -ef|grep
|grep -v grep' and see what that process is. Once it is verified, then you can kill them using the command
#fuser -k /dev/vgxx/lvolx
Then following the above 'lvextend,extendfs,mount' process to extend it.
If you have OnlineJFS or not can be found using the command 'swlist -l product |grep -i onlinejfs'.
-Sri
You may be disappointed if you fail, but you are doomed if you don't try
