Cracked it. Though God knows how. I went into the disk utility and made like the thousand monkeys writing Shakespeare (i.e. hit every button about 10 times in combinations of 4) and the erase button did the trick. It initialized the disk and placed it on the desk top. I then was able to clone the firewire drive to the main drive and hey presto I'm up and running in a very eerie silence! It just proves that if this banana fingered gibbon can do it, anyone can! the only thing I didn't do - excitement took over, was partition the hard drive. Why would I want to do this? What are the advantages? Thank you one and all for your help. Sorry for being a simpleton. Still not sure which jumper pins I should be using, it is set between upper slave and upper master still as per the drive I took out. Rossi