Of course all of this started while I was away from the house on vacation....
I noticed it was getting big lags when trying to access my folders. Rebooted the machine and it told me it couldn't find one of the drive anymore, so I shutdown machine so I could troubleshoot when I got home. I get home to find out it can't see any hard drives, including the boot drive. Chalked it up to the power supply and bought a new one. I can now see all drives, EXCEPT for the one, which making repeated humming noises then stops.
I've pretty much accepted I lost my data and that drive has failed and removed it from pool. But S.M.A.R.T. warnings are telling me another disk is starting to go bad. I attempt to remove the disk from the pool like the user guide says but I am getting an error. "Error Removing Drive - the system cannot find the file specified".
Not sure what to do now. I know I need to remove asap, but I want to get the data off of that drive.