Blast from the past, and happy I found back the original blog that pointed me to this: Not a complete failure » Blog Archive » How to copy a file with I/O errors?.
A long while ago, I helped out a friend with a HDD that was partially working. He neede the bits of a file that had become unreadable by regular means.
dd to the rescue: it takes a lot longer, but gets the job done eventually. Eventually can be T+eternity.
Note that you always should copy such a file to another drive, like described in the above blog.
Something like this (the parameters are explained at the dd man page):
dd if=/mounting-path/directory-path/damaged.mp4 of=resurrected.mp4 conv=noerror,sync
Usually for creating disk images, dd works on *n*x, Mac OS X, Windows with for instance Cygwin, ESXi, etc.
See also: linux – Rescuing a hdd with bad sectors: dd vs gddrescue – Super User.
–jeroen
via: Not a complete failure » Blog Archive » How to copy a file with I/O errors?.
Filed under: *nix, Apple, Cygwin, ESXi4, ESXi5, ESXi5.1, ESXi5.5, Linux, Mac, MacBook, MacBook Retina, MacBook-Air, MacBook-Pro, OS X, OS X Leopard, OS X Lion, OS X Maverick, OS X Mountain Lion, OS X Snow Leopard, OS X Tiger, Power User, SuSE Linux, VMware, VMware ESXi
