On V5 RC-5 my disk 2 (a 1TB Samsung) is not assigned to any shares.  Yet it is reporting that it is 73% full.  Is there some kind of way that I can rectify this situation?  This array has 7 disks total (Parity, Cache, 5 data)

Enable the disk share for this drive, and see what's actually on the drive.

I guess I don't understand.  There are no shares assigned to this platter, yet it is not empty.  Is there some kind of way that I can see the (raw) data that is on it?

Enable the disk share for disk 2.

Are you saying that the disk cannot be seen if you log in via telnet and go to /mnt/disk2?  Having said that if that is visible, I would expect there to be a disk2 share visible on the network which would allow you to examine its contents over the network.

 

You always have the option of using a telnet session into the unRAID server and finding out its linux device id, and mounting that manually as something like /mnt/tmp so you can look at the data.