TechTool 3.03 Unmounted Hard Drive After Repairing Volume Structure

Hi Apple Discussions! Any help, advice or information anyone can share will be greatly appreciated. So here's what happened:
I have a 17" imac Flat Panel. *After using TechTool 3.03 to repair the Volume Structure (had gotten a 92 Error Message) Techtool would not quit.* I turned off the computer and *when I restarted I heard the foghorn sound instead of the regular start up chimes and then got a* *Kernel Panic (You have to restart your computer.)* Since the computer was a gift I didn't know if it was still under warranty but I called AppleCare anyhow. Even though the warranty has expired the rep stayed on the phone with me and tried to help. She had me eject the TechTool disk by holding down the mouse (who knew?) and insert the OSX disc....*Long story short the Hard Drive is no longer mounted.* She set me up with an appointment at a Genius Bar.
I hooked the imac up to an old ibook via Firewire and accessed the imac's hard drive (can't use my new MacBook Pro because it has a different Firewire pin.)
*I also zapped the PRAM and know it chimes on as usual but I still get the Kernel Panic.*
I was curious so I continued to research and I see *Apple warns to not use TechTool 3.03 to repair Volume Structure errors for OSX 10.4 which is what the imac is running.* Of course, if I knew ahead a time....Is this why the Apple rep helped me even though my warranty expired? *She said they just need to remount the Hard Drive. I'm wondering what that entails and can I do it myself?* I'm not looking forward to lugging my imac down to the Apple Store on 5th Ave. in NYC!
Thank you and sorry for the very long story!

retromercury wrote:
Hi Dale, Thank you for your response. When I use DU to Verify or Repair I get this message:
*Invalid b-tree node size*
That's a pretty serious error. I'm pretty sure even the updated version of TechTool could not repair it.
If I wanted to download the TechTool updater and use it on the imac how would I do that since I can't log on?
I was thinking you could use your iBook at the time. But the TechTool disk is machine specific so that may not work.
I'm taking it in today to a Genius Bar so we'll see.
Hopefully they will run DiskWarrior on it. Otherwise it's an +Erase and Install+. hope you have a backup!
Thank you for your help. I also just learned that it is an imac G5 (oops!)
You are quite welcome! Good Luck!
Dale

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