>I haven't had occasion to install many internal hard disks, but I was >under the impression that the OS would only allow one disk to be >designated as master. Would you happen to know where to find the >instructions for installing two masters? Or do you just set the jumpers >on both to the master setting? > >Steve Robertson Each IDE bus can have a master drive and a slave drive. Your computer probably has at least two IDE busses. One intended for up to two hard drives and one for your CD/DVD drive. The CD will normally be set as master, so you could slave another hard drive in that buss but you probably won't be able to boot your system from the slave drive on the CD buss. Apple system profiler will show what active busses and drives you have on the "devices and volumes" page. --