Time to fill another gap or two in my knowledge. In another list, in a thread that I found while googling for info about cyrus and postfix, I ran into a conversation where someone suggested that (for the purposes of the other people in the conversation - most of them setting up or managing fairly large mail systems) ext3fs was not as good as reiserfs, and they should do this: "In /etc/fstab go to the /var [entry] and change it to something like /dev/cciss/c0d1p1 /var reiserfs data=writeback,noatime 1 2 Reboot the system " I think the implication was that you can change the fs just by changing an fstab entry. Is that true? I thought that sort of thing would have been laid down at formatting time and just formalized in fstab, and would therefore be a bit more difficult to overhaul than just an edit of one file and a reboot. Also, while we're on the subject, is Reiserfs the hands-down better, faster, more reliable-in-both-ordinary-and-extreme-situations, file-system? A Linux Journal article from a couple of years ago seemed to think so, and supplied several feature-comparison tables to prove it. Or is that the kind of question likely to stir up religious wars? (in which case, forget I asked :-) Kevin