The FAT is many sectors long, I'm not sure why Windows would re-write the entire thing. Now, OTOH, you could just mark the areas the FAT uses, and all their al

The FAT is many sectors long, I'm not sure why Windows would re-write the entire thing. Now, OTOH, you could just mark the areas the FAT uses, and all their aliases as in-use in the bitmap, that'd prevent them from being overwritten (but chkdisk would notice). You could additionally put a file on all those sectors, then chkdisk would pass, but you'd show a fairly large amount used (for your large file).