My first question is one that I can't solve yet, but I think th solution is simple.
I have an hitachi cam and dvd-recorder, and those units records in dvd-ram format.
I don't know if my computer dvd unit, can read those files; and my question is if there ara a way to read those files with a dvd unit taht not supports dvd-ram.
I don't think so, but neverminds.

Thnaks a lot.

An optical drive has to be specifically built to use DVD-RAM: none of the ones in Macintoshes are, for example. Most newer PC drives are, so it's worth trying. The format, when you mount it, is UDF. If your drive is an old one, or just doesn't support the technology, you're just out of luck. The problem is physical format, with hard-sectoring, which the drive has to be built to recognise.

PS Rather belatedly, a warning. Be vary careful when using a UDF disk on your computer. The udf module for fsck was never finished, so if you damage the filing system, you can't repair it! Mount as read only.