I'm new to this forum so please move or advise....
I've got a Sony DW-R56A as a replacement drive in my dell laptop and on the whole not bad (or better than the last drive).
However I've had soem problems with not recognising media. I was using 2.4 datarite and they've been fine, but tried some 4x bulkpaq and bigpockets (generic) and nothing. This was after a few hours of rendering a home movie so all was lost. Any clues why it doesn't like any of these media. I thought if it couldn't write at 4x it would just write at the fastest speed it could.