Periodic lurker, but decided to finally make an account after I got these babies: off craigslist for a total of $30. It's a G4 Sawtooth (450MHz) and a G4 Quicksilver (867MHz). My plan is to use the QS to run OSX (it has 10.4.11 installed), Linux, and indulge in a bit of nostalgia and frustration with OS 9 (NOT installed! I'll have to see if any of the shops around here still have any floating around). For the Sawtooth, I'm going to eventually use it for a casemod project, and strip it of parts in the meantime. And that's where we run into an issue. The QS had a dead PRAM battery that I was able to replace with the one from the Sawtooth, and the Sawtooth had an additional PCI video card I put in as well. So far, so good. But when I tried to put the 26GB hard drive from the Sawtooth into the GS, things went awry. I put it in the slot above the stock harddrive in the QS and started things up. I got the good old flashing ? folder. Restarted and held down Option and it was unable to find any drive to boot up. I rechecked the connections and tried again and got the same thing. (Also, the case seems to have a harder time closing with the second hard drive in. What's up with that?) I took out the second drive and the QS started up fine again. So what's the issue here? Is it creating some sort of panic because I didn't wipe the drive from the Sawtooth first? If so, I'll have to track down copies of OS 9 and/or OSX (a good idea anyway), since I haven't had luck booting either of them from USB. Is it something I'm completely missing? Thanks!