Failing Disk

[Troy Knabe]

Well, I didn't refer back to the list before I started the dd, so it is running tonight, and if it fails, I will try the dd_rescue tomorrow.

Thanks to everyone for their input.

-Troy


> George Magklaras wrote:
> > Jim, I disagree with you. I would be interested to know how dd 
> would 
> > handle read errors on the failing drive. :-) Have you 
> completed many 
> > rescue operations with drives whose reliability is 
> questionable 
> > without hickups only with dd???
> >
> > If his failing drive is in a bad state and is likely to give 
> > persistent I/O errors, doing a dd the way you describe it in 
> your 
> > number list will either abort the read operation or copy 
> things 
> > inconsistently. Again I would substitute dd with dd_rescue. If 
> his 
> > blocks are OK, dd_rescue will behave exactly as dd. If the 
> blocks on 
> > the origin drive are broken, it will persist until it copies 
> as much 
> > data as possible.
> >
> You are right, I mentioned previously he may have problems if 
> the drive 
> was actually failing,  dd_rescue never even came to 
> mind.  Thanks for 
> pointing it out.
> 
> -Jim
> >>
> >>  
> >>    Mark,
> >>
> >>    Did I give bad advice?  I have used dd 
> quite a bit and never had any
> >>    problems.  Granted I am always copying 
> to identical drives.  Now 
> >> that I
> >>    think about it, it would be important to 
> have identical disk geomerty
> >>    (cylinders, heads, sectors).  Sorry 
> Troy, guess I'm exposing my 
> >> ignorance.
> >>    :)
> >>
> >>    -Jim
> >
> >
> >
> >
> 
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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Troy Knabe
Senior Systems Administrator
Computing and Information Services
4J School District
knabe at 4j.lane.edu
Ph: 541.687.3587
Cell: 541.968.0780