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Re: [Bug-ddrescue] Mac OS X examples of use

From: Dennis Juhler Aagaard
Subject: Re: [Bug-ddrescue] Mac OS X examples of use
Date: Wed, 02 Apr 2014 16:55:13 +0200
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:24.0) Gecko/20100101 Thunderbird/24.4.0

Hi John,

The use of ddrescue in Mac OS X is a bit different than other systems.

1. I haven't got the --sparse option to work properly in OS X. So i dont use it. Maybe others will say otherwise.

2. You should use /dev/rdisk0s6 this way you will be using the raw device. Much faster recovery.

3. You are already using a log file, this way you can stop ddrescue just by pressing ctrl-c and resume it by running the same command pointing to the same log file.

For normal rescues this should cover it. For unnormal cases you should play around with it.

Happy rescuing. :-)


On 02/04/14 08.26, address@hidden wrote:
Greetings friends,

I have run into a tricky recovery. I have never needed more than the following to recover most drives …

"sudo ./ddrescue -v /dev/disk0s6 MyRecovery.dmg MyRecovery.log"

Things didn't look like they were rolling along so I went to check the manual for starting and stopping. I noted there was a --sparse option which I know Mac OS X would likely support but I am not sure how to implement it. 

I am also not sure how to stop ddrescue then later resume. I think this would be handy to know.

Does anyone recall seeing any sites that have some good examples of usage as it applies to Mac OS X?

I originally started with tips from the Mac OS X Hints website so if there are other sites that anyone knows of I would appreciate being pointed in their direction. I know this isn't a bug but I don't know where else I can find the information.



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