Is there a way to make a rewritable DVD UN-rewritable?

As in like permanently keep the data, I don't think so. You can easily format RWs.
 
The whole point of a re-writable DVD is so it can be re-written. If you want one that cant be re-written buy standard DVD-R or DVD+R, they are cheaper than the RW counterparts and you cant re-write them : )

Ryan
 
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