Hi,
I've Added a new disc Label field, which you can use to store your disks numbers and such,
the preliminary information is extracted from the source disk when importing images, and can be edited any time using the update Image data context menu. the label information is displayed on top of the image when the image is missing.
You can either test it in the Beta version, Read this thread, or wait for the release, I would be really interested in your feedback,
Regards,
.