Info:
Aix 4.3.3
file system is jfs.
(forgive me, I'm a solaris kinda guy)

I forgot to turn on largefiles for a /udb file system. I am wondering
(hoping) that I can edit /etc/filesystems to largefiles, umount/mount,
possibly reboot. If not I can backup/nuke/make/restore with no
issuses, just hoping it won't be that time consuming.

Tried smitty jfs, but unable to change it.