Just to let you guys know, turned out to be one of my hdd's that had failed. 1TB cav black for those of you interested. It would seem I am still able to access the data on the drive.. its just hit or miss whether or not it funks up. Backing up now, setting up RMA, buying another 2TB hdd, setting up raid5! I do not want to have something like this happen again. I am lucky the data can still be accessed.
Thanks again for all the advice!
Thanks again for all the advice!