Not sure if anyone will come back after I marked this as solved.. However
While running the 'Check Filesystem' rectified the error, and fix the two drives. I had found not long after that a good number of files from my Plex library were missing. After some digging around on Google and this forum, I found that all the data was in a directory 'Lost and Found'
Unfortunately its not only movies and TV shows.. But its thousands of backed up photos and other files I was storing on Unraid..
Im currently downloading the whole directory onto my local machine.. As far as I can see its 206GB worth.. and over the next few days... weeks, I will be going over each of the folders, pushing them back up to where they belong... Obviously not the backed up files, as I have them locally.
See you in a year when IM done