Hi, I've tried to find this info in several other places but can't get a specific answer. Perhaps you guys can help. I'm running a Dual 2.5 Ghz Power PC G5 with OS X 10.4.9. This morning I tried to install a second internal hard drive, that will not be a startup disk. Its going to be used as a scratch disk for video and photo work. The drive is: WD Caviar Black SATA. After installing the drive into the lower drive bay, I turned the computer back on and it said it couldn't recognize it. I clicked "intialize..." And now I'm in disk utility not really sure what to do. I have the DVD for OS 10.5.6. Apparently I need to format the disk? I don't really know what that entails. I'm not really prepared to update my startup disks OS. Can I still format the secondary drive with the newer software? How does one "format" a disk anyway? Any help greatly appreciated.