After some problems with WinXP which resulted in the slave drive vanishing, I finally managed to get up and running again but, when booting, the following message appears:_-"Primary slave.Ultra DMA mode 3. SMART capable but command failed. Press F1 to resume". On pressing F1 the system then boots normally. Extended tests have been run twice on the disk with no problems, except the statement "Smart status - not available". Speedfan shows the same. My thinking is that this may be related to the 'main' BIOS, which gives the following information:- Primary IDE master - cd/dvd Primary IDE slave - the 80GB disk in question, which has yet to be formatted for use. Secondary master -cd/dvd Secondary slave - not detected Third master - 160GB disk containing the operating system and files. Fourth master - not detected. Details for the Primary Slave show S.M.A.R.T monitoring supported, and it is set to 'auto' The order of the items has, I think, changed since everything worked normally, probably as a result of my having to fix the mbr in the Recovery Console. I think it should be shown as 'Third IDE slave", although whether this will fix the SMART problem remains to be seen, but I can find no way of changing the order. This is foreign territory for me so any advice and help will be greatly appreciated.