My DNS-343 has been working with 3 harddrives until recently. It reported a HDD3 failure one day and slot 3 and 4 now no longer recognize hard drives, although the drive did not fail as I was able to read and access the data through a dock.
I tried to put in a brand new hard drive in slot 3 and the NAS didn't even see it. Putting the same hard drive in slot 1 or 2 works. Any thoughts?