Re: [Bug-ddrescue] 10KB/sec data recovery rates - possible cause?

[Paul L Daniels]

Following up:

> 
> I updated my ddrescue line though to deal with the situation where I
> might find bad blocks during the read (a very real thing).
> 
>   ddrescue -i ${RECOVERY_SIZE}M -T 20 -v -f -s 1M /dev/sdd img log
>

        I switched over to an eSATA (powered) connection and I was
        able to get 120K/sec until the drive hits the 4th head on the
        platters which is dead.  Each time this happens the old
        'quirk' that I've observed where the data rate doesn't recover
        until you ctrl-C and restart is back.

        Can you (Antonio) tell me where the data-rate/read-size
        adjustment occurs [ when errors are returned ] in your C++ code,
        as I have to be honest, I'm very much more of a straight-C
        person and as such I'm getting a little lost in the C++.  I
        just want to first try disabling the rate-adjustment to see if
        I can start to isolate where this quirk is coming from.

Regards,
Paul.



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