She means on Macs with two or three IDE buses. Separate Buses. Like adding a second drive under the optical or in the case of MDD Macs, to the second HD bus with each set to master for their respective buses. k On Tuesday, February 18, 2003, at 05:00 PM, Scott Baldwin wrote: > I didn't think a mac would run with two disks configured as master. > When I installed a second drive in my G4 dual 500, it was set to > master, as was the existing drive, and the computer wouldn't boot > until I set them up as master and slave. This was in OS 9. Can two > drives be set to master in OS X? > > I eventually installed OS X on the new drive, which is set to slave, > while OS 9 is still on the original drive set to master. Should I > have OS X on the master? does it matter? does anybody really know what > time it is..... > > Scott