Replacing a failing HD

[Craig Deal]

> -----Original Message-----
> From: owner-freebsd-questions at freebsd.org 
> [mailto:owner-freebsd-questions at freebsd.org] On Behalf Of Bob Ababurko
> Sent: Tuesday, October 18, 2005 5:27 PM
> To: Craig Deal; freebsd-questions at freebsd.org
> Subject: Re: Replacing a failing HD
> 
> Craig Deal wrote:
> >  
> > 
> >>>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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> >>
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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
> >>
> > 
> > 
> > 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
> > 
> > 
> 
> I would think that you can dd from a small drive to a large 
> drive, but if the is possible _definitely_ not the other way 
> around.  Which size are source and dest. drive?
> 
> -Bob

I should have been clearer. The source is 30GB and dest 60GB.

Craig