PowerBook\'s HD disappeared!

[BRG]

My son's PowerBook 3400 has lost its hard drive.  When I start it up, the folder and question mark appear, and the computer will not load the OS 9.

I booted up with TechTool Pro and ran it.  I manipulated the software to search for any "missing volumes", and it found the PowerBook's hard drive!  

Then I received a message that the volume directories need to be "rebuilt" on the hard drive.  But the "Rebuild" button, on TechTool Pro, is grayed out, so I cannot do a rebuild.  Plus, I cannot see the PowerBook's hard drive on the desktop.

Please advise.

[Dreambird]

Do you by chance have DiskWarrior? That would probably do the trick...

I'm sorry I don't know why the option is greyed out in TechTools... are you using a new enough version like at least 3.0.5?

[BRG]

Dreambird,

Thank you for replying.  I did try DiskWarrior and
had no success.  I have been using TechTool 3.0.6
without success.

I think it may be time to initialize the hard drive (yeech!).