2009/1/4 <Valdis.Kletnieks@xxxxxx>: > On Sun, 04 Jan 2009 00:41:51 GMT, Duane Griffin said: > >> I agree, it isn't a great situation. Nonetheless, it has always been >> thus for ext3, and so far we've muddled along. Unless and until we can >> replay the journal in-memory without touching the on-disk data, we are >> stuck with it. > > 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. Cheers, Duane. -- "I never could learn to drink that blood and call it wine" - Bob Dylan -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
