m_flynn at comcast.net on 9/30/06 said >Can the OS be installed on an external drive? Maybe I could do that and >see if I could save some of the data? If you have another mac available [preferably in the hands of a mac knowledgable person] and can connect them by firewire.. turn yours off and leave the other one one. Connect the firewire. Turn your mac on while holding down the "T" key. Yours should turn "on" with a firewire symbol floating across the screen. Then look on the other computer and yours will appear on their desktop as a mounted volume. You can then transfer the files you want to the other computer. when you are done transferring all the files you want, remember to eject the virtual disk before disconnecting. Then turn off your computer. Then disconnect the firewire. After you are sure you have what you want [which should work, because you are NOT using your operating system.] then you can do all that running disk warrior. Of course if it doesn't work, you might as well run disk warrior anyway! -- Barbara Needham P.S. And when you get everything running again, schedule regular backups.