Each frame that I scan takes three minutes. That gives me over an hour of down time for other things. What I have been doing during that time is improving our photo database which is now up to 285,000 images. The areas for work are times, photographer and general keyword improvements. Photos taken with our modern digital cameras don't need photographer and date help because our cameras put that info into the EXIF automatically.
Lightroom is a good database manager for photos. The main problem is that when you ask it to do a lot of things (like update EXIF data on a lot of photos) it has to open lots of files write to them and then close them. This takes a lot of time. Lightroom uses a lrcat-wal (write ahead list) file to keep a list of catalog updates to be executed as time is available. This can take a long time and I watch the goings on using Task Manager. The problem is that this process can become overwhelmed and cause a "not responding" situation which never resolves itself. Using Lightroom with big image catalogs requires patience.
Today's photo is of Robert and David at the Gap of Dunloe in Ireland during their trip with Ginny in 1997