Lots. But I also still have all the mxf files on an external hard drive. I checked those and couldn’t find any problems.
I’ll explain my archiving workflow and maybe someone can spot a problem:
The P2 reels vary in size from 1gig to 16gigs. I can backup to DVD any reel under 4gigs. Those that are over 4gigs, I duplicate a suitable number of times and then bring them back into FCP P2 import. There, I can rebuild the duplicates by removing clips until I get the size of each one down to ~4gigs. Make sense? Thus, for example, while reel 1006 might be put on one disk because its 3gigs, 1007 (15gigs) will become 1007a, 1007b, 1007c, and 1007d.
I’ve never had any trouble importing files from these divided reels as long as they are on a hard drive (checked them when I started having the grey screen problem). Only once they are on a DVD do some clips seem to show up with only a grey screen. My guess is that there is some sort of problem created by dividing the reels up into subreels.