Re: data corruption: revalidating a (removable) hdd/flash on re-insert

Pavel Machek
2008-11-04T20:20:33Z

> >> Every access to removable media is guarded by this revalidation check.
> >> If you don't see these events, you should not trust this reader, and
> >> at least never change the media while it is connected.
> >
> > This is rather nasty data-corrupter.
>
> Sure, it is.
>
> > Could we at least blacklist
> > broken device, and force revalidation on each close or something like
> > that?
>
> What's your idea of revalidation if the hardware does not tell you?
> Get an md5 of the disk content? :)

Well... you should not eject media while fs is mounted or blockdev is
open, correct?

So can we simply claim 'media changed' on last close/unmount? Sure,
sometimes media was not changed, but that only hurts performance, not
correctness... ?
Pavel
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