Originally posted by XtremeMaC
now when its writing the light of the dvd=rw goes from red to yellow, yellow to red and recorder's buffer keeps going up and down, used read buffer is at 98-100%.
Are you using the real 811, or "upgraded" 401/411?
I did not have any problems with my 411 writing at 4x before. Recently I have changed several things at once (stupid me) - applied Zebra v4 mod to convert my drive to 811, flashed HSOP firmware, and upgraded Nero from 184.108.40.206 to 220.127.116.11. After that I'm experiencing exactly the same issue as you are. The same +R media (RICOHJPNR01, packaged as Memorex 4x) that used to take <15 min to burn at 4x, now takes >40 min to burn with read buffer going up and down all the time. And - the same thing happens when writing CD-Rs, not DVD.
But - TMPGEnc DVD Author burns the disc (same media) at "Max" speed for less then 10 min - that's why I think this might be the Nero issue. Unfortunately, I didn't keep the 18.104.22.168 installer - but I'm going to find it and try to downgrade Nero to see if it makes any difference.
Right now I don't have anything to burn - so it will be a while before I actually make any new tests. Please post if you find out anything new about this problem.