Does that file also exist on the offline volume at the following location?
Raws copy 1/Raw files to burn/090328_Put_People_1st/090328_Put_People_First_052.NEF
Yes, it does. It's a backup copy of the working file on Perky. It has the same dates etc as the other copy and opens normally. It should be an exact duplicate. Files on that drive are normally only accessed in order to be copied to a working drive.
David