Now that's a real challenge. When I converted a bunch of diskettes to images some years back I ran into a couple of problems, one of them was that I could not really tell apart copy protection from bit rot. So if a disk is degrading I couldn't possible tell it apart from the protection. Of course copy-protection on the last track was a classic, and easily spotted, but that's about all I could spot.
The other problem I ran into was 1050s failing with use. I had probably 2 or 3 1050s fail (read all error sectors) after doing some 300 disk images. The PRO images were particularly stresful, reading things over and over.
We (or, say I) can ask Steven Tucker about the PRO format - He is nice enough. Is there some way in which VAPI is superior in the information that it stores? I mean, we can low-level all we want, but if at the end of the day we get the same data back, there was no point.
BTW, "Ijor", you wouldn't be "Iljor" the cracker from Argentina, would you?
-Fujur.