I am running Mac OS X Snow Leopard 10.6.2, Mac Pro dual quad-core 2.26 Intel Xeon, 12GB RAM, burning with Roxio Toast 10.0.4. I had previously gotten several good burns with my LG BH08LS20 with this config, but lately it is making coasters. The good burns look mostly even if you look at the burned side. The bad burns have a lot more different varying rings, "zones" or what-have-you. Sometimes you can even see a speck where the burn did not do anything and it's the same "color" as the un-burned parts of the disc.
I am wondering if perhaps power supply could be an issue here? The Mac Pro can draw a lot of juice, up to 1500 VAC. But normally it's just sitting there at 300W or 320W max, even in burning it does not seem to jump very high. So I tried updating my firmware from the Buffalo version (for NS20) up to the 2.00 for BH08LS20, using no hacks. Still, coasters, but now it's much slower to verify and such!
I'm using CenDyne BD-R 4x 25GB media. I would maybe think it's the media but I was able to burn about 20 or 30 of these, no problem. Suddenly now it's coasterizing almost every burn. What am I doing wrong? Could it just be a defective drive? I'm going to blow it out with a dust blower but I kind of doubt it's from dust.
Any help/tips would be most appreciated.