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From: "Craig Deal" <craig@advantagecomputer.biz>
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Date: Tue, 18 Oct 2005 16:19:53 -0500
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Subject: RE: Replacing a failing HD
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> > Hope it's ok to continue this thread, but can you explain in more 
> > detail how to use dd to copy a HD. I read "man dd" and was 
> unable to 
> > figure out how this is done.
> > 
> > Thanks,
> > Craig
> > 
> > _______________________________________________
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> > 
> This is what I have done in the past.
> 
> dd if=/dev/da0 of=/dev/da1 bs=8192b
> 
> where da0 is the disk you want to copy and da1 is the new, 
> blank disk. 
> I should also mention that it is wise to do this in single 
> user mode.  I actually have read this somewhere and 
> understand the point of it, but I must also say that I have 
> done it both ways and they have both worked. 
> YMMV  I would have to say it is all dependant and what you 
> have running.
> 
> I have done this too many times to count and it is very easy.
> 
> peace,
> Bob
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> 

I tried this and got the following error:

ad0: FAILURE - READ_DMA status=51<READY,DSC,ERROR> error=40<UNCORRECTABLE>
LBA=8387712

Any ideas what the problem might be? Do the hard drives have to be
identical? One is a 30Gb and the other is a 60GB.

Thanks,
Craig