> In the past (not for some years) I've had drive combinations that > would not work well together - usually different brands of drive > on the same system. On some such, no amount of playing seemed > to produce an acceptable result. YMMV.. MMDV I installed XP (and a specific few applications) on the new 500GB SATA and made that the boot drive. My other XP is on the 80GB drive, which was previously the boot drive and my workday drive Booting from the 500GB has restored full speed to the DVD. A 4GB 8x burn + verify now takes 14m instead of the complained- about 80+m. Real Producer processing time has also significantly reduced, back down to where it used to be. Inter-drive copying is also faster CPU useage whilst burning with Nero has dropped from almost 100% down to 1% So, it seems there is nothing inherently wrong with the hardware but XP on the 80GB drive has got really upset about that missing drive. I'd looked through the Error Viewer and there are yellow and red drive alerts everywhere For the time being I'll organise my activities so that I can re-boot to burn or process. When time permits I'll strip the machine down and try to find out what the problem is Thanks for suggestions Joe * * ********** Quality PIC programmers http://www.embedinc.com/products/index.htm --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .