create iso file for DVD using mkisofs Slackware10.2
 

I need some advice on how to create an iso file to
burn on a DVD. I've got a lot of data I need to save
in directory /my_data There are several subdirectories
under /my_data and about 3 Gigs of stuff.
I used a command that always worked for regular CDs:
mkisofs -r -J -o /store_iso/mybig.iso /my_data
It created a mybig.iso file which I tried to burn onto
a DVD, but failed half way through. So I wasted time
and ruined a DVD for nothing.
Could someone tell me how to create an iso file
that will burn onto DVD?
Is there a way to test the iso file before attempting
to burn it to a DVD? I don't want to ruin more DVDs.
I know my LG DVD burner works fine because I've used
it to fry DVDs with iso files I downloaded. They all worked.
Any information would be most welcome!

ever tried k3b?
growisofs is what you are looking for ( in ap/dvd-something.tgz )

k3b is highly recommended ... that way you don't ruin any more DVDs.

Now, if you still have problems with k3b, then say so.