Re: document ext3 requirements

Theodore Tso
2009-01-04T18:41:04Z

On Sun, Jan 04, 2009 at 02:24:43PM +0000, Duane Griffin wrote:
> > Is there a way using md/dm/lvm etc to make the source partition R/O and
> > replay the journal onto a CoW snapshop? Admittedly, not easy to do inside
> > the 'mount' command itself, but at least it might be workable for LiveCD R/O
> > mounts and forensics work, where you can *tell* beforehand that's what you
> > want and can jump through setup games before doing the mount...
>
> Yes, something like that is best practice, as I understand it. The
> LiveCD init scripts could check whether they are about to R/O mount an
> ext[34] filesystem needing recovery and either refuse with a useful
> message to the user, or even automatically create and mount a COW
> snapshot, as you described. They'd still need to warn the user though,
> since things like remounting R/W wouldn't work as expected.

So what's the use case where people want to be able to mount a
filesystem needing recovery read/only without running the journal?

- Ted