Paul,
Thanks for posting the solution to your problem! Nine months later I had a related problem and was able to fix it after searching the Cow and finding this thread. I wanted to post this because my problem is related to offline hot-swappable drives that I used for a separate project and I’m sure others work the same way. So here’s my workflow, the reason it’s a related problem will become obvious:
I bought a four bay, removable drive eSATA box with the idea of using different stripped arrays for different projects. Today I had to go back to work on an earlier project which is stored on an internal array inside my G5. Since I didn’t need any files on any of the disks used in the external box, I didn’t turn it on. When I tried to open the earlier project (by double clicking the project icon directly, so FCP was not looking for any newer projects or their media) I got the same dialog box you mentioned at the top of this thread.
I searched the FCP manual for “Missing Disks” to no avail, then searched the Cow. Thank you! Problem resolved.
To be very clear for anyone who comes across this problem: When you get that dreaded dialog box, choose the “Reset Scratch Disks” button, find the missing volume in the scratch disk list and hit the “Clear” button for that volume. Then, back in the Missing Disks dialogue you’ll now have a “continue” button.
Regards,
David