Try SpinRite from Gibson Research.

http://www.grc.com/sr/spinrite.htm

Tom

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Michael Firth wrote:

>  Is there a utility for scanning the disk surface like the dos utility
>  scandisk but you don't have to keep telling it to repair every time
>  it comes to a bad cluster, you can leave it to get on with it and
>  repair when needed, It must be able to run from floppy or a boot
>  disk.
>
>  Thanks
>
>  Mike
>
>  The NOSPIN Group is now offering Free PC Tech support at our newest
>  website: http://freepctech.com
>

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