[purplefuzz]

Here is my situation.

I backed up my files (under Tiger 10.4.10) in a new, unpartitioned MyBook Studio Edition for Mac.

I proceed to update my system to Leopard 10.5.

I plugged in the external hard drive, and Time Machine starts to initiate backup. I have both TM and SD on the same partition. D'oh!

I quickly stop Time Machine, and try to boot into the external drive.

My Powerbook was unable to recognize another bootable drive at startup. After reading through a few more threads here, I tried Option+Power, as well as Sys Pref --> Startup Disk. I also powered down the HD, and plugged it back in during Option+Power. None of these techniques worked.

My concern is if TM somehow made the ext HD "unbootable". This is odd, since going to Sys Pref --> Startup Drive, shows the ext HD as bootable. How will I recover my old system? Is there a way to make the drive bootable again? Thanks in advance!