fstab entry = /dev/sr0 /cdrom udf,iso9660 user,noauto 0 0
Will mount iso dvdr's but will not mount udf ones

If I change the order of udf,iso9660 thus :-
fstab entry = /dev/sr0 /cdrom iso9660,udf user,noauto 0 0
Will mount udf dvdr's but will not mount iso ones

How do you set up linux so it will mount either kind of dvd. I can't keep editing the /etc/fstab everytime I use a different kind of DVD. I assumed the first line with udf,iso9660 meant it would mount both kinds of file but it doesn't?

God it's mad I've spent hours trying to work this out then 5 minutes after I post here I 'continue' googling only to work out the answer myself. I was misinformed by some bloke on #mythtv-users. What I really need in /etc/fstab is this

Then it works fine - doh!!! Thought I'd post a reply rather then deleting post in case anyone else gets stuck on this. God knows what udf,iso9660 is supposed to do, cos it just ignores the first udf item in fstab and tries iso9660 and that's all.