Re: [Bug-ddrescue] Why doesn't ddrescue revert to full speed long after a bad read?

[Scott Dwyer]

I too have observed this same behavior of the read of good sectors being 
slow after encountering errors, and stopping and restarting resumes at a 
good read speed again. I will make a note to check for sure in the 
future, but I am pretty sure it happens with direct disc mode also.


On 3/26/2013 12:07 PM, Antonio Diaz Diaz wrote:
> Paul L Daniels wrote:
> > Not sure if I'm missing something, but I've noticed that after a bad
> > read ddrescue never returns back to the full speed capability, however,
> > if I cancel the process and restart it (obviously with a log) it
> > immediately returns to full speed.
>
> I do not remember to have observed this behaviour, but my drives are 
> far slower than the ones you seem to be using. If you are missing 
> something, then I am also missing it. :-)
>
>
> > This behaviour has been seen on multiple versions of ddrescue and
> > multiple different drives and systems. Am I missing something obvious?
>
> Maybe it is some internal switch of caching modes. Does this also 
> happen with direct disc mode (option -d)?
>
>
> Regards,
> Antonio.
>
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