Slave it to the master original drive. Or, you can put it by itself on the ATA 66 bus. mark On Tuesday, December 24, 2002, at 11:51 am, T. Brown / groucho wrote: >> I'm installing an additional IDE drive in my dual 1ghz. Does it >> matter which bus it's installed on? I thought I had read somewhere >> that there was a protocol for adding drives; I can't find any >> reference now.