[Zoejian]

I think I've seen that before... Try this:

1. Quit Pro Tools
2. In the finder open up which ever hard disk you are recording to
3. There should be a folder called Digidesign Databases
4. Inside that folder there should be a file called volume.ddb - rename this file to old_volume.ddb
5. Relaunch Pro Tools (Pro Tools will automatically create a new volume.ddb file)
6. If this solves the problem, you can delete the old_volume.ddb file

If I'm thinking of the same error, this occurs when there's a major system crash and you get that grayed out screen with all the different languages on it telling you to hold down the power button to shut off the computer.

Good Luck!