Ok my mistake. Why do you have your boot drive as the only thing on the primary channel why is it a slave? 'Slow' does not really provide any enough information but IF you have not re-installed the OS then I would suggest doing a parallel install of the OS and see if that also is 'slow'. If it is then it is h/w otherwise you are likely to have now redundant configuration settings which are still looking for the missing drive. This is just a guess based on experience. Occasional pause in the UI are indicative of a stalled i/o operation. Alan Melia t: 0118 977 4963 m: 0781 771 0060 w: www.melmac.co.uk -----Original Message----- From: Michael Watterson [mailto:mike@radioway.org]=20 Sent: 25 November 2010 12:24 To: Microcontroller discussion list - Public. Subject: Re: [OT] New drive slows processing On 25/11/2010 11:53, Alan Melia wrote: > Simples... IDE is as fast as the slowest device. Now your new set-up have > your boot device and IDE on the same chain then your disk is running at the > same speed as your DVD drive. > > Spend a =A310 (or whatever your currency is) and put in an additional > controller for the DVD. > > Alan Melia > w: www.melmac.co.uk > > The previous set-up was > > Primary Master 80GB IDE (XP boot) > Primary Slave 160GB IDE (failed) > Secondary Master DVD IDE > 320GB USB external > 1TB USB external > > New set-up is > > Primary Slave 80GB IDE (XP boot) > Secondary Master DVD IDE > 3rd Master 500GB SATA > 320GB USB external > 1TB USB external no, the DVD drive is on a separate port with its own IRQ. Also it too is much slower than it was before. Something else is wrong. What you say would only apply if HDD and DVD are Master & Slave on same=20 port. Which is not a good idea. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .