well, I can't confirm it, but it has been done before,
I have been able to recover 2 otherwise unreadable cdroms to recover backed-up multitrack music takes.
You have a bit to read, you will need a blank (spare) partition to copy the data to, it must be equal or larger that the partition you want to recover.
It takes time, but eventually the data can be used. I'm no expert, but it works well.
forensics.LQ tute with dd_rhelp...
others covering testdisk...
Since researching further on this subject I discovered autopsy, a recovery application sleuthkit with web-browser interface.
It's available on helix live cd...