Disc error? No back up? No joy with re-installation

Hi Guys,
I have a black MacBook MAC os x 10.4.9.
Following a failed software update I tried to restart the computer. It continuously idled on the pale screen with the spinning icon. I tried restarting it with the grey 'Install discs'.
In systems Utilities - Verify and Repair disc, gave the error:
Invalid node structure
Volume check failed
1 volume could not be repaired because of an error.
I tried reinstalling the operating system but it does not list a 'volume destination'.
So:
1. Do I have a hard disc fault?
2. Foolishly I didn't back anything up - if I could reinstall the system will it erase all the data on the hard disc?
3. Where do I go form here?
Your words of wisdom will be gratefully received (as I'm reaching the point of chucking it of the window of a tall building!)
Thanks,
Ramzi

Hello rrajab,
Welcome to the Apple Discussions...
Sometimes you can use Disk Warrior to solve the dreaded "Invalid node structure" error and that's not always a good solution as Disk Warrior is around $100.00 and not guaranteed to fix the problem.
In your case you stated that you attempted to boot from install DVD to reload OSX and the drive is not displayed. This indicates to me that your drive is most likely dead.
Now Disk Warrior may be able to fix it but it will cost you $100.00 to try.
If you could reinstall the OS, and that is doubtful, then you'd do an archive and install to safe guard your old data.
This problem is likely not going to get fixed with out formatting the drive and at that point you data is gone.
But again your drive is not being recognized so you may need to get a new drive for the Mac...

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