Scandisk on a DVD

[michael]

Had a nice time at the pubmeet last night

I asked a tech question and now, for some reason, can't remember the
answer I got.  So I'll ask again

I've built an archive server with mirrored disks using rsync and set it up
so it copys new and changed files to a diffs directory which are burned
to two DVD one of which goes to my Mum and Dad :-)

Given that DVD's are fragile I should really periodically check that there
OK is there a linux scandisk for this sort of thing?

--
Michael