Simon,
SB> At a guess I'd say Norton is picking up on exactly that point. Yes SB> its great you've used a unique identifier, no Norton doesn't know SB> anything about it, so doesn't no how to react. What should an SB> arbretary piece of software do about a file system wuth an unknown SB> unique identifier?
Since the spec is so clear, I thought that the author of Norton Disk Doctor would have accepted any value in this slot.
[snip]
SB> In short, if you really have to, change the value to something SB> that works quietly.
The problem is that many users check their media with Norton and whine when it barks. I remember many problems with the bundle bit and with the modification date.
Thanks for your answer.