When I tried to download it, I got a "401 Authorization Required"
error message. any ideas?
MacBook Pro running OS 10.6.8
>I have had some luck recovering data from burned discs using the
>command-line tool ddrescue:
>A version for Mac (OS X 10.5+) is available here:
>ddrescue doesn't itself do any error correction, but rather extracts
>the readable data bit by bit --
>often at many times slower than real-time, depending on the number
>of errors -- to a disc image
>file representing a complete read of the disc minus any bits that
>are missing. You can then mount
>this disc image (OS X will do this natively) as if it were a CD-R
>and use the CD ripper/audio
>extractor/error correction software of your choice on it, which may
>be more successful than on-
>the-fly correction from the optical disc itself.
>Another feature of ddrescue is that you can run it multiple times on
>the same disc, and each time it
>will go back and try to fill in the bits that are missing. That
>obviously won't work with data that's
>completely gone, but sometimes can recover data that didn't read
>correctly for some other reason.
>And these subsequent reads are faster because the program is only
>addressing the missing data,
>and skipping over the parts it has already successfully captured.
>But the best case will be if you have two copies of the degraded
>disc. In this case ddrescue can
>scan both copies, merging them into one image that will probably be
>error-free, since it's unlikely
>both discs have degraded in exactly the same places. And again,
>only the missing bits are read
>from the second disc in an attempt to fill in the gaps.
>[Disclaimer: I haven't used this particular
>feature of ddrescue myself yet, but am describing it based on
>information on the project's web
>It's a bit more involved than popping a disc in, firing up iTunes
>and clicking "extract," but it's
>worked for me when nothing else would.
>Aaron M. Bittel
>UCLA Ethnomusicology Archive