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Hi I've been using a Pioneer 107d for about 4 months now without any problems , however yesterday it started burning coasters one after another and also causing swirl marks to appear on the bad discs, I'm using Ritek G05 8x media and never had a problem with them, I thought maybe I had a bad batch but I then tried a TDK 4X DVD+R and it also coastered and has these same swirl marks , Should I just assume its bad or anyone have other ideas, One other wierd thing I noticed is both Nero and DVD Decrypter wont let me burn any higher than 4X since this started happening, I'm using the latest official firmware .. Thanks in advance

Heres a pic of one of the burns.

A few things to try:

1. Make sure that DMA is enabled for the 107D... and the rest of your IDE devices

2. Try another IDE cable

3. Try the drive in another computer

whoah that design on the bottom is kinda cool

Wow, I can't believe this actualy worked but someone told me they had the same problem and fixed it by using a brush type cleaning CD , I figured what the heck and bought a Scotch brand cd lens cleaner (has small brushes on the bottom) and it actualy worked! Nero & DVD Decrypter now let me burn at 8x and so far i've burned 3 images in a row with no problems or swirl marks, I've always thought these cleaning cd's were a gimmick but guess I was wrong, I was so close to ordering another burner to.. Thanks for the replies.

glad to hear it worked for ya, you must have had some serious dirt on the lens