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Re: [Bug-ddrescue] Weird behavior with options -d and -c
From: |
xerces8 |
Subject: |
Re: [Bug-ddrescue] Weird behavior with options -d and -c |
Date: |
Wed, 03 Dec 2008 11:35:44 +0100 |
Reading more sectors in one go gives higher transfer rates.
So why does ddrescue behave that way ?
It gets a error response from kernel and assumes the sectors are unreadable ?
Regards,
David
-----Original Message-----
From: Antonio Diaz Diaz <address@hidden>
To: address@hidden
Cc: xerces8 <address@hidden>
Date: Wed, 03 Dec 2008 01:12:17 +0100
Subject: Re: [Bug-ddrescue] Weird behavior with options -d and -c
> xerces8 wrote:
> > When I add "-d -c 1500" to the command line, ddrescue does not copy,
> > but as it says "Splitting error areas...".
> > Also it says : errsize: 640 GB
>
> Do you mean "weird user behaviour". ;-)
>
> Why are you asking ddrescue to read 1500 sectors (768kB) at a time
> directly from the drive? I suppose your drive does not have an internal
> buffer so big. See the kernel log messages to confirm it.
>
>
> Regards,
> Antonio.