I got a new 2.93 macbook pro with the 320gb 7200rpm drive and it runs fine. I have an older 100gb SATA Seagate notebook drive that I wanted to use as a backup drive, so my goal was to use the old drive in the new MBP. The rest of this post is my frustrating journey of failure. First off, I put in the install disc with OS X, shut down, swapped drives and rebooted, holding down C to boot to the disc. The disc never boots, and the screen stays gray. The old drive works fine in my thinkpad, and has run Windows, OS X and Ubuntu. Thinking that it may be a drive partition issue (GRUB or whatnot) I booted OS X on my thinkpad and formatted the old drive as 1 GUID partition. Also tried MBR partition. Neither works. No matter what, the computer never boots to the install disc when the old drive is connected. When I disconnect the drive, it boots to the install disc fine. I've even tried my Leopard disc, not the machine-specific disc that came with the MBP. Neither one would boot with the old drive connected. I've tried holding down 'C' I've tried booting in single-user mode and running fsck -fy and /bin/fsck -fy. It always runs the check on the disc, not the hard drive. It would seem like the old drive is just dead, the way OS X just can't boot or recognize it, but the weird thing is that the old drive works just fine in other machines. It's a Seagate SATA 2.5" 7200rpm 100GB drive, which to me seems like it should have been an easy swap into the new MBP. Any help would be appreciated. As a last resort, I'm thinking of purchasing a firewire 400/800 cable and connect my MBP with the old drive inside to my MacPro. Then install OS X from the MacPro to the MBP through target mode.