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    SubjectRe: Blockbusting news, results are in
    On Tue, 21 Oct 2003 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.

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

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