Thanks, Glen, however catalog in on another disk entirely.
New, very bad situation. I formatted the new disk. Then, in LR5.3, I created a folder and then dragged another folder from the source disk, about 17,000 files, into the new folder on the destination disk; then I left.
When I came back a couple of hours later the operation was complete, LR said. However, only 92 files showed up in the Library on the destination disk. I decided to try again.
But first I dragged those 92 images on the destination disk back to the source disk and deleted the first created folder. All this in LR.
I dragged the folder again from source to destination but LR said there was already a folder by that name on the disk.
It turns out that almost 800 (not 92) images had been moved to the new disk. I found this out in Explorer. All those images on the destination disk do not show up in the Library so I can't move them back to the source within LR.
So... I now have all those images not in the catalog. Does this mean that I also lost all that editing info? How do I get them back to the source?
Do I dare trust LR to move them to the destination? If it didn't work this time why would it work next time?
Any suggestions? (I have backups of all images and the catalog)