Re: [Bug-ddrescue] Weird behavior with options -d and -c

[xerces8]

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.