hi , our centos os has an ext3 file system. and i cant create any more directories, it gives me a too many links error, even when doing a manual mkdir.

is there any workaround for this? without changing it to a different file system like reiserFS? we dont have a reiserfs module in the os so it will have to be installed. and can it be possible to install a reiserFS without having to reformat the os? just mount it after installing? please advise