[Chaosu]

Thanks for help, above worked. I had one in DMA and one in PIO, I have probably switched cables as I shuffled my drives and roms a while ago.

I belive defragmenting could help if there would be only memory buffer going down, but device buffer was jumping all the time and memory one just sometimes.

PS. It's LG and I never had any problems with it, used Lite-on before and they are usually sending new burners quickly if broken ; )