dd_rhelp
Submitted by Anonymous on Thu, 02/28/2008 - 20:23.
I've been a huge fan of this distro from the moment I laid eyes on it. I posted a few times already. Someday I might have time to actually contribute to the effort. For now, please accept a simple suggestion. I found a very intelligent approach to recovery with dd (assuming the tool author's description is correct) in a tool named "dd_rhelp". Please consider incorporating it into this distro. Given a limited lifespan on a failing (or failed) disk, dd_rhelp seems to be a brilliant approach.
dd_rhelp is a script that is
dd_rhelp is a script that is probably known by many as the archetypal data-recovery imaging tool. An imaging tool is the cornerstone to a data recovery toolkit.
Gnu-ddrescue is the same kind of tool and is currently supported and actively developed. Gnu-ddrescue also offers better performance than dd_rhelp. It is a better choice than dd_rhelp.
My understanding of dd_rhelp
My understanding of dd_rhelp is that it focuses on getting data from the good (readable) sectors first and then going back for the sectors that are troublesome. This approach seems best for a failing drive, where getting the most data you can before total failure is the objective. I don't know how to get that effect from Gnu-ddrescue ... is my memory failing me?
Gnu ddrescue does the same
Gnu ddrescue does the same thing. It will skip the bad sectors and zero-out those bytes in the image file. Once the whole drive is imaged, it will go back and split the bad sectors. It will read and re-read, taking smaller and smaller reads.
It is quite effective.