Recently my 1G iMac G5 running Tiger kernel panicked during a restart after Software Update. When rebooted, it didn't recognize the system and instead showed a folder with a flashing question mark. I started off the Tiger install DVD and ran Disk Utility, to no avail. I then connected it to my iBook via Firewire target mode and started transferring files from the iMac to the iBook. The problem came when I returned several hours later and found that the Finder on my iBook had died, quitting but not relaunching as it should have. I rebooted the iBook and reattempted to connect the iMac using Firewire target mode and found that the internal drive for the iMac was no longer recognized. Its internal Superdrive was recognized and the iMac did come up with the flashing Firewire icon on the screen. However, no matter what computer I connected to, the internal iMac hard drive was not recognized. When I booted it off the Tiger install DVD, it again did not recognize the hard drive and would not let me reinstall on it. What can I do short of calling Apple for a replacement? Are there some things I can do to try to get the hard drive recognized? And finally, are hard drives apt to fail so suddenly and quickly as it did?