Share through DFS not accessible

So I am not a server technician, nor incredibly knowledgeable with servers in general, but I've been working in IT for about 7 years and have a client who recently had an issue with a file server.

He has a server, NAS1, where is has Modular Disk Storage Manager running. Everything looks fine except the batteries on both his raid controllers have gone bad. They are both still listed as being online, despite the batteries. He is running RAID 6 to host a virtual drive. 

In looking under DFS he has a folder (located when I navigate to \\NAS1\), filled with links to other folders. 

The links point to \\DFS\R1_client but when I attempt to navigate there, I get an error saying it doesn't exist. 

Is there a way to look at the real entire contents of the entire drive?

I feel like when I navigate to \\NAS1\ I'm just seeing mapped shares from wherever the real drive is located, but I don't know how to access it.

All these DFS links broke the moment his second controller battery died, so would this have anything to do with it? Is it an issue with the controller?

This is a bit over my head and so any detailed walkthroughs of what may be the case would be HIGHLY appreciated. :)