Re: Mount DVD disk

[Robert Nestor]

It’s been a few years since I played with RW DVD so this may not be correct, 
but as I recall they’re basically like flash.  New write/deletes basically 
revector previously written blocks to new blocks called “sessions” until there 
are no more unused blocks on the device OR the last write closes the session.  
At this point the DVD becomes RO and can only be restored to be RW by totally 
erasing the DVD.