Re: undo an mke2fs !!

From: Geert Uytterhoeven
Date: Fri Nov 07 2003 - 17:59:38 EST

On Thu, 6 Nov 2003, Pavel Machek wrote:
> > > > If you had backed up the metadata using an e2image command, you would
> > > > have been fine, but that command takes a while to run, so most people
> > > > don't bother to do this. (Not a bad idea for the absolute paranoids
> > > > in the house would be to run e2image out of a cron script and save the
> > > > image file on some *other* filesystem.)
> > >
> > > Assuming I have e2image (I'm actually started to thinking it is pretty
> > > good idea)... how do I restore it?
> >
> > <Blush> The libext2fs library routines are there, but the userspace
> > tools haven't been written yet. What I've done the few times when
> > I've used it is to let debugfs access the image file, and use it
> > mostly for examination purposes.
> >
> > What I'll probably do is add debugfs commands that allow you to copy
> > the superblock/block group descriptors, or the inode table, or the
> > block/inode allocation bitmaps from the image file back to the
> > filesystem. As I said, the library routines are there, but debugfs
> > front ends haven't been written yet. If someone has a critical
> > situation requiring them, I could probably throw together patches
> > within a day or so.
> I guess I'll start recomending e2image to people trying software
> suspend ;-). It really seems like neat tool for "easy backups".

Note that according to Ted's first post, e2image backs up the _metadata_. He
didn't mention the real data...



Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds

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