I would boot the computer in safe mode and here is the instructions.
Learn how to start up in Safe Mode.
Products Affected
Mac OS X 10.4, Mac OS X 10.3, Mac OS X 10.2, Mac OS X 10.5
To start up into Safe Mode (to Safe Boot), do this:
- Be sure the computer is shut down.
- Press the power button.
- Immediately
after you hear the startup tone, hold the Shift key. The Shift key
should be held as soon as possible after the startup tone but not
before.
- Release the Shift key when you see the gray Apple icon and the progress indicator (looks like a spinning gear).
During startup in Mac OS X 10.4 or later, you will see "Safe Boot"
on the login window, which appears even if you normally log in
automatically.
During startup in Mac OS X 10.2 through 10.3.9, you will see "Safe Boot" on the Mac OS X startup screen.
To leave Safe Mode in any version of Mac OS X, restart the computer normally, without holding any keys during startup.
while your in safe mode see if you can uninstall the drive software and reinstall it
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