Ok, so everything was working fine until a couple days ago. My SMB network share became unaccessible. I went into the web interface and checked SMART info. One of the drives has an unusual listing in the SMART test history (http://i.imgur.com/LsAMFMm.png). Thinking it had failed, I pulled it out, put it in another computer, and ran the Western Digital drive testing utility, doing the extended test. After about 6 hours, it the drive passed the test.
So, realizing that it wasn't the drive, I stuck it back in, booted, and went to the web interface again. The RAID 5 array shows up as "clean". The filesystem shows up as mounted and online.
However, heres the issue. In the Shared Folders tab, my "Files" folder shows up fine. But, when double clicking on it to edit it, up comes this error message (http://i.imgur.com/z9ARTTO.png). Clicking on "show details" gives me this (http://i.imgur.com/W7Z8odE.png).
Also, trying to create a new shared folder also doesnt work. After selecting a volume (the RAID array), trying to choose a path does not work - it tell me to pick a volume first, even though I obviously have the RAID volume selected. (http://i.imgur.com/DJbCQEA.png).
Lastly, the actual hard drives as well as other functions seem to work and function fine - PLEX still works, and those files are in that same /Files shared folder.
I greatly appreciate any help you guys can give me!