Re: disk error / failure: need help! (smart failure predicted)

From: Eric W. Bates (ericx_lists_at_vineyard.net)
Date: 12/12/03

  • Next message: Kurt Jaeger: "Re: routing according to traffic type..." 
    Date: Fri, 12 Dec 2003 10:02:04 -0500
To: freebsd-isp@freebsd.org

    We've successfully used dump/restore in this situation. I suspect that
    dd is faster, tho.

    In single user:

    dump 0fB - 10000000 / | (cd /newdisk; restore -rf -)

    Check the man pages. 10000000 is an arbitrarily large number to make
    sure that all blocks of the disk in question are read.

    Steve Bertrand wrote:

    >>>At the moment the disk works (still). What is the easiest way to
    >>>copy everything from this disk to another new one (including boot
    >>>mgmr, mbr)
    >>>
    >>>the system has in total 3 disks, but only the first (the broken one)
    >>>is bootable.
    >>>
    >>
    >>Put in another disk drive temporarily, and since this is only a one time
    >>thing, you can use dd. Try to eliminate most, if not all access to the
    >>box:
    >>
    >># dd if=/dev/ad0 of=/dev/ad4
    >>
    >>Substitute ad4 with the dev name of the temporary drive. Once dd is
    >>done, take out the primary disk and replace it with the new clone. Read
    >>man dd(8) as I don't know off the top of my head what the optimal
    >>options would be for dd in this case.
    >>
    >
    >
    > I'm following a thread in questions right now, and I must agree with
    > some of the posts stating that using dd on the / filesystem could cause
    > grief if the partition is mounted. You may want to use a fixit floppy or
    > alternative boot method and then dd the disk to ensure no writes occur
    > whilst in transfer.
    >
    > Steve
    >
    >
    >
    >
    >>Steve
    >>
    >>
    >>>thanks,
    >>>arie
    >>>
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  • Next message: Kurt Jaeger: "Re: routing according to traffic type..."

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