On Tue, 2001-11-13 at 10:59, Yannick Ribau wrote:
> So it might work if I boot from a rescue CD with a kernel supporting
> xfs, then do the dd command without mounting the partitions (using
> /dev/hda...) ?
Yes, it would work in this case - you are just creating an identical
copy of the fs. But if this is an option, then so is xfsdump/restore
which would take up less space.
Steve
>
> Yannick.
>
> Steve Lord wrote:
>
> > On Tue, 2001-11-13 at 10:10, Yannick Ribau wrote:
> >
> >>hi all,
> >>
> >>is it possible to make a "dd conv=noerror /dev/hda2 /dev/hda3" to have a
> >>complete backup of my root filesystem, then do a
> >>"dd conv=noerror /dev/hda3 /dev/hda2" to restore it, in case of a soft
> >>filesystem problem ?
> >>
> >>(both partitions have the exact same size)
> >>
> >
> > On a live filesystem this is not too smart an idea, the block cache and
> > the live filesystem are not totally coherent - in fact depending on the
> > kernel version they can be totally incoherent (changes to one are
> > invisible in the other).
> >
> > You at least need to do a remount readonly to make the disk
> > image stable - and this will fail if a file is open for writing
> >
> > Steve
> >
> >
> >
> >>Yannick.
>
>
>
--
Steve Lord voice: +1-651-683-3511
Principal Engineer, Filesystem Software email: lord@xxxxxxx
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