Re: Blockbusting news, results are in

[Richard B. Johnson]

On Tue, 21 Oct 2003 Valdis.Kletnieks@xxxxxx wrote:

> On Tue, 21 Oct 2003 16:05:15 EDT, "Richard B. Johnson" said:
>
> > If the respondent wants them isolated into a "BADBLOCKS" file,
> > he can make a utility to do that. It's really quite easy because
> > you can raw-read disks under Linux, plus there is already
> > the `badblocks` program that will locate them.
>
> Yes, it's trivially easy to figure out that block 193453 on /dev/hdb is bad.
> It's even not too bad to map that to an offset on /dev/hdb4.  Even if you're
> using LVM or DM to map stuff, it's still attackable.  But how do you guarantee
> that block 193453 gets allocated to your badblocks file and not to some other
> file that just tried to extend itself by 32K?
>
>

You repair file-systems when they are not mounted. Also, the
source of an old version of e2fsprogs has a "defrag" utility
that could be used as a sample of how to create a file that
owns the bad blocks you find.

Cheers,
Dick Johnson
Penguin : Linux version 2.4.22 on an i686 machine (797.90 BogoMips).
            Note 96.31% of all statistics are fiction.


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/