RAID is not a replacement for a backup! Here's why.
My NAS Navigator lists the HDD as Unformatted. The system was originally set up as RAID 5. I am not sure what to do at this point. The drive display is "Emergency Mode - No array info" How do I reestablish the array, etc.
first thing you need to do is reinstall the firmware. Once this is done then let us know if the disks are still showing as unformatted.