[SOLVED] simple q.: how to stop zimbramon

[maumar]

put me in lamers corner, but i was not able to find answer after 10 minutes of searching!
i have to resize /opt logvol, i prefer to do it offline unmounting /opt.
# umount /opt
umount: /opt: device is busy
umount: /opt: device is busy

/etc/init.d/zimbra stop
nothing, still busy
chkconfig zimbra stop;reboot
nothing, still busy

i could reboot server with /opt unmounted (taking it away from /etc/fstab) but i let this as last chance.
So how can to stop zimbramon and every other process that keep /opt busy?
help lamers

[maerten]

Disable the crontab entries of zimbra and make sure no (zimbra) processes are currently running with "ps"