I'll just detail what happened, any and all suggestions would be helpful. 1. Ran Permission repair utility: everything checked out 2. Ran Disk repair utility: Catalog error found 3. Rebooted mac with techtool deluxe cd. 4. Enabled all tests (including volume structure test) 5. All tests check out fine save for volume structure: which is what I expected 6. prompted me to "repair" drive, clicked "ok" 7. After repair successfully completed rebooted mac 8. Kernel Panic upon reboot 9. After multiple reboots, restarted from Tiger install disk. 10. According to Tiger install disk, main hard drive is "unmounted" and un-journaled 11. Re-started again from TechTool Deluxe Cd 12. Ran Tests again (this time only Volume Structure) Passed TechTool completely recognizes my hard drive, and everything on it (correct amount of space used etc. While OSX says I have nothing on it, and refuses to boot normally without the aid of a CD. What are my options at this point?