Suddenly my 451s can't burn DVD+R media at 4x speed anymore. I didn't apply any firmware that's not for the 451 (f.e. 451s -> 851). I'm using FW GSB6. I tried different media manufacturers (Fuji, Sky, Intenso, Platinum) but the problem is every time the same:
The burn process ends without problems but when I trie to read the disc afterwards the disc can't be read towards the end. When it's a movie, the last 20 min can't be played. When it's data, the last few files can't be read.
When I burn at 2,4x speed, the discs read fine. DVD-R also work fine at all speeds.
What do you think is the problem here?