I have solve the problem with a little help from my other mac...
This is what I did...
I connect my powerbook G4 to a macbook by firewire, the powerbook is set to taget disk mode. And connect my macbook to the external hard drive.
Then I use superduper to copy all files from the external ahrd drive to my powerbook. It works fine.
But I am wondering what is wrong with my external hard drive?
It's not bootable as mentioned but if I clone the drive to my powerbook, it's fully functional.... Is it the problem of the formating of my external drive?
Is there any specific requirement for a external bootable drive?
If I can solve this, maybe restoring my data will be easier... thanks a lot!
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