cp/ditto and ignore I/O errors?


 
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Old 06-08-2010
cp/ditto and ignore I/O errors?

Hi I am copying some old CDs to HD and while copying a lot of them have I/O errors. What I'm doing right now is sudoing the cp command to force the cp to finish but when I do this it takes about an hour to copy 500mb, which without errors would normally take 2-3 minutes.

I assume it takes so long because when it encounters an error it will just keep on trying to copy it until it fails a certain number of times then gives up? Is there any way I can tell it to not try so many times and give up faster, or just ignore the errors and copy what it can?
I also tried the ditto command and it seems to just be doing the same thing as cp...
So basically I just want it to copy and if it encounters an error to move on to the next file. If we can figure out a good way to do this I would also like to get it to output the errors to a text file, I was thinking:

"$ sudo cp -R /Volumes/Source/ ~/Destination/Destination/ 2>&1 | cat /Destination/Destination/log.txt" ?
If I could add something to that to get it to ignore the errors that would really save me a lot of hours and I would be very grateful, and also would the above work to save the std error output to a txt file?
Thanks.
Any help is appreciated.
I'm running OS X 10.5

Last edited by pludi; 07-04-2010 at 12:58 PM..
 
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