|Subject:||Re: [Bug-ddrescue] Feature request: Enhancement to man / TexInfo documentation|
|Date:||Wed, 4 Sep 2013 15:46:23 -0400|
<snip> All references to non FOSS software.
First, and most important, please allow me to complement you on one of the best and most efficient recovery utilities I have found.
Allow me to suggest the following entries be included in future documentation:
· Within the “useful things you can do with ddrescue” part of the documentation. . .
o Example: I have a newly received Ubuntu distribution disk that I ordered, and I like to create image, (iso), files of these disks so that if one is damaged or lost, I can recover from the image. If I use “dd [infile] [outfile] bs=(some multiple of 2048)” then – unless the disk is EXACTLY the same multiple long – the last read fails with the potential for data being missed. If I use ddrescue, I can choose an efficient large chunk size for the rip. Once I reach the end of the disk, there’s an EOM (end of media) collision that causes ddrescue to back-off and make progressively smaller reads until the last 2048 bytes is read – whereupon it ends.
o Command used: ddrescue [option: block size = 2048 bytes] [option: blocks per initial chunk = 512] /dev/sr0 (or whatever) ./diskname.iso ./diskname.log – which assumes you’re sitting with a terminal window in the folder you want to write to.) Note that I am not on my Linux box while I write this, and I don’t remember the exact option commands.
· Within the “Rescue methods” of ddrescue. . . .
Again, let me thank you for an excellent utility and let me express my gratitude on behalf of everyone who depends on ddrescue, but has not had the time to write you personally to express their thanks.
Jim "JR" Harris
Arrowhead Computer Consulting, LLC
Some see things as they are, and ask "Why?"
“Impossible” is only found in the dictionary of a fool.
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