I have a number of servers which are currently mounting /usr as ext2.  I 
have a means of doing an tune2fs -j on all of them remotely en mass but
I'd rather not reboot them all to enable journaling on machines that are
up and not having issues.  I've tried to do a:

mount -t ext3 -o remount /usr

as well as just a mount -o remount after changing the fstab.

on a test box but it just blows out a usage message.  Is there a way to
do this remount without a complete reboot that'll be transparant to
users?


If not, is it dangerous to tune2fs the filesystems, change the fstab and
then leave the box up for 2-6 months and let them reboot through
atrrition, upgrades, etc?

Current kernel is 2.4.21-ac3, getting outages and upgrades is a rather
long process involving regression testing, etc.

Robert

:wq!
---------------------------------------------------------------------------
Robert L. Harris                     | GPG Key ID: E344DA3B
                                         @ x-hkp://pgp.mit.edu
DISCLAIMER:
      These are MY OPINIONS ALONE.  I speak for no-one else.

Life is not a destination, it's a journey.
  Microsoft produces 15 car pileups on the highway.
    Don't stop traffic to stand and gawk at the tragedy.