Re: [Bug-ddrescue] Skipping over tar pits

[Lou Bilancia]

It may be that the drive is spending lots of time doing error correction. I
usually run Steve Gibson's SpinRite to recover and remap sectors from a
failing drive before I proceed to image it.  If it is unsafe for SpinRite
to run it will generate a warning to that effect.  Best software I've ever
purchased.

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




On Mon, Aug 14, 2017 at 10:51 AM, Ole Tange <address@hidden> wrote:

> On Mon, Aug 14, 2017 at 7:01 PM, Ole Tange <address@hidden> wrote:
> > On Mon, Aug 14, 2017 at 9:56 AM, Ketil Froyn <address@hidden> wrote:
> >
> >> From your description, I'd guess that one of the heads on your drive is
> >> having trouble, while the other ones work ok.
> >
> > In that case we should expect the problem to arise at a fairly
> predictable rate.
>
> It looks like Ketil is right: I get around ~50 MB of tar pit and ~150
> MB of smooth sailing. Then ~50 MB of tar pit again. The drive is
> hts545050b9a300 and has 250 GB/platter + 4 heads according to
> https://www.hgst.com/sites/default/files/resources/TS5K500B_DS_final.pdf
>
> Given that I have finite amount of time what is the most efficient way
> of getting all the data, that is fast to copy, and skip the data, that
> is in the tarpit?
>
>
> /Ole
>
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-- 

Lou Bilancia, P.E.
Synnovation Engineering Inc.

cell: (503)572-5519