When I installed my 80 gig hdd, and clicked the optimal geometry button or so, it was read badly. So I got some information about my hdd from WDC website, entered it, and it works flawlessly... AFAIK, the only important information, is the total number of sectors, that mustn't exceed the top sectors value of the hdd, else You would rewrite Your data :PPP

Bye, MarK.