Replacing a failing HD

 

> -----Original Message-----
> From: owner-freebsd-questionsfreebsd.org 
> [mailto:owner-freebsd-questionsfreebsd.org] On Behalf Of
Gayn Winters
> Sent: Tuesday, October 18, 2005 8:53 PM
> To: 'Craig Deal'; freebsd-questionsfreebsd.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
> > > >>>
> > >
>>>_______________________________________________
> > > >>>freebsd-questionsfreebsd.org mailing list 
> > > >>>http://lists.freebsd.org/mailman/listinfo/freebsd-que
stions
> > > >>>To unsubscribe, send any mail to
> > > >>
> > >
>>"freebsd-questions-unsubscribefreebsd.org"
> > > >>
> > > >>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
> 
> A couple ideas for dd:
> 
> Have you tried bs=512b ?
> 
> How about conv=noerror ?
> 
> 
> -gayn 


Using "bs=512b" worked. I booted to the new disk
and everything looks ok. I
also ran "fsck" in single user mode, which
indicated no problems. Can I
assume everything is ok, or is there anything else I should
check?

Craig

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> -----Original Message-----
> From: Craig Deal [mailto:craigadvantagecomputer.biz] 
> Sent: Wednesday, October 19, 2005 7:07 AM
> To: gayn.wintersbristolsystems.com; freebsd-questionsfreebsd.org
> Subject: RE: Replacing a failing HD
> 
> > > > > I tried this and got the following
error:
> > > > > 
> > > > > ad0: FAILURE - READ_DMA
status=51<READY,DSC,ERROR> 
> > > > > error=40<UNCORRECTABLE>
> > > > > LBA=8387712
> > 
> > A couple ideas for dd:
> > 
> > Have you tried bs=512b ?
> > 
> > How about conv=noerror ?
> > 
> > 
> > -gayn 
> 
> 
> Using "bs=512b" worked. I booted to the new
disk and 
> everything looks ok. I
> also ran "fsck" in single user mode, which
indicated no 
> problems. Can I
> assume everything is ok, or is there anything else I
should check?
> 
> Craig

I'm sure it is ok, but I'd double check the output of fdisk
and
bsdlabel.  You've got some extra space now and you may want
to use it.
Read the handbook on moving to a larger disk.

-gayn


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