So I was encoding some video using ffmpegX, ripping a DVD with OSex, and surfing the internet with Safari, and all of a sudden, Safari hangs while trying to load Imdb. Safari also unexpectedly quit earlier this afternoon too, it was kind of weird. Anyway, I hit Opt-Cmd-Esc and it sits there for a little while and nothing happens. I can still move all the windows around and change applications at this point, and the status bar on ffmpegX is still moving. I then try to quit Safari by right clicking the dock icon and going to Force Quit, but the Dock hangs right when I move my mouse over the Safari Icon, so the dock is frozen with part of it magnified. At this point, everything else hangs, the progress bars in ffmpegX and OSex stop moving, and all I can do is move the mouse around, can't switch windows anymore, and so I try Opt-Cmd-Esc a couple more times and nothing happens. The HD is still making noises, it was doing like 2 read/write sounds in quick succession, then a short, like half a second maybe, pausem then 2 more sounds, it just kept repeating this. So I reluctantly hold the power button and do a hard restart. BTW, the machine this is happening on is in my sig, a dual 2.5 w/ 2x512 ram, 250 gb HD, running 10.4.3, that's the OS version we're on, right? I've downloaded all the updates, security updates, everything is updated fully. Anyway, upon the reboot, it hangs on the white screen with the gray apple, the circle of lines below it doesn't come up, I have my computer set to boot in verbose mode by default, and it didn't get that far to the console, it just hung on the white apple screen. The hard drive was also making the exact same pattern of noises when that it did when Safari hung originally. So I hard reboot again, and the same thing happens, except not the HD noises this time. So I turn on my external firewire and boot from the Tiger partition on that, which boots up fine, (That's what I'm on right now, same computer, but booted from external drive) my internal HD doesn't appear on the desktop, so I open up disk utility and Macintosh HD is grayed out. I click on "233.8 GB Maxtor 7Y250M0" and the SMART status is verified. I try to mount Macintosh HD with Disk Utility and it brings up a dialog box that says Mount Failed. The disk "Macintosh HD" could not be mounted. Try running First Aid on the disk and then retry mounting. So I hit repair disk, and the status window says: Invalid Volume Header (In red) Checking HFS Plus Volume Checking Extents Overflow file Invalid Key Length (also in red) Volume Check failed. (Red) Error: The underlying task reported failure on exit. (Red) 1 HFS Volume Checked 1 volume could not be repaired because of an error I also booted from the Tiger Install disk and ran first aid, got the same messages for Mount, Verify, Repair, everything. I also zapped the PRAM, reset-nvram and reset-all from Open Firmware, none of those helped. Is there anything else I can do, short of reinstalling everything? Is this something that DiskWarrior might fix? I don't have a copy of it, but I might be able to get a hold of one from the ITS helpdesk (I'm at college, and I really don't feel like reinstalling everything if I don't absolutely have to.) It doesn't seem like a hardware failure, since the SMART status is still verified. Uh oh, I just checked the SMART staus again, and it says "Not Supported." It's still in black letters, and it's not Unverified, or Failing, so that's not as bad, maybe? I guess it might have said not supported earlier, I can't say for sure, it definitely didn't say Failing or anything though. Any suggestions are greatly appreciated.