Re: Blockbusting news, results are in

[Theodore Ts'o]

On Tue, Oct 21, 2003 at 04:21:26PM -0400, 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?

Read the e2fsck man page, and pay attention to the -c, -l, and -L
options....

						- Ted

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