I think if you used xcopy pro and copied the disk to a new disk and where the errors are use the other disk and copy just those tracks, you should have a 100% working disk!
There is no guarantee that the same data is actually present in the "same" tracks...
True... We don't know how the backups were originally made. If it was a track/sector copy, such as an XCopy would make, though, this is very likely to work.
First, XCopyPro the original to a blank (destination) floppy. Note any failed tracks. Now, copy just those individual tracks from the backup to the destination floppy. Presto, the destination floppy should now be a totally fresh disk with 100% of the data. (Provided the Original and the Backup floppies originally contained the exact same data and layout. I've done it before and actually had very high levels of success under these conditions.)
The key thing is, even though it might work, or it might not.... It won't harm anything. For sure it is a better suggestion than copying the original disk to itself, which is typically a horrible idea, as if the read fails, you don't get a second chance.
