Re: dd and xfs

[Yannick Ribau <yannick.ribau@xxxxxxx>]

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...) ?
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.