Is it possible that i log into the server with ssh and umount only /var and then resize the logical volume?
Yes, but you'll have to stop a lot of daemons and other processes that run with files opened in /var.
You can find the processes accessing /var with lsof or fuser: # fuser -mv /var # lsof /var
I stopped all services except sshd and fuser and lsof doesn't show me any files, but i still can't unmount /var :-(
# umount /var umount: /var: device is busy umount: /var: device is busy
Ayn ideas?
Thomas