I've been looking all over google and the forum for this... lots of results, but nothing is quite covering it. I have four drives in an external USB 3.0 enclosure connected to my Mini (2012). Two of the drives have disappeared in Finder. If I search for a file located on them and choose to "open enclosing folder" I can see the drives, although they're greyed out. This isn't causing me any huge problems. I can access all the files on the drives, I can write to the drives, copy, delete, connect to them from other computers on the network, etc. But I'd like to be able to see them without jumping through hoops. When connecting from another computer I see them the same as the others. The drives are both the same model 3 TB drives and this just started a couple of days ago. I've done the logical things - unmounted, mounted, restarted computer, etc. All the drives in the enclosure are formatted the same way - journaled, encrypted. Any ideas?