I got a new 1640 and now I want to full erase a RW.
On my old LiteOn erasing of the RWs needed the same time as writing.
With the new 1640 the formatting process is only working for few seconds (with DVDInfoPro).
With NERO the formatting starts but never ends (the infobox with the timeinfo is running - and never stopped) but the led of the 1640 stopped flashing.
I have this problem on + and - RWs (high and lowspeed).
Does anybody know an answer?