> Just for reference, I've decided that mount is too lax about
> dirty flags; on a change to multi-user, the system just complains that
> all the filesystems are dirty - but still mounts them!  Since you can't umount
> /usr ("device busy"), you then have to hard boot immediately to recover
> usefully, ... see, copying a kernel to /dev/reload syncs disks.

(1) on a change to multi-user, why are your file systems _ever_ dirty?
    if booting to multi-user, rc should be checking your disks.  if
    going from single-user, your disks should have previously been
    checked, or you should make sure that you've fsck'd them yourself.

(2) have you tried using 'mount -u' to update the mount information?
    there is an undocumented mount option 'reload' which causes file
    system buffers to be flushed and reloaded from disk.  you should
    be able to forcibly update-mount /usr read-only, then reload and
    update-mount it read-write.




cgd