I have a 2nd gen Drobo that had 4 3TB WD Green drives that was working well. Then I read that those drives were incompatible so I decided I would change them out with compatible drives and upgrade the drives to 4 TB, the max for this device as I understand.
I put in one new drive and it behaved normally. I understood I could continue to use the drive, which I did without incident. After 24 hours the lights are still blinking so I decided maybe my using the drive was slowing the transformation so I stopped using it. After about 48 hours I noticed the device had disappeared from the finder and the Drobo Dashboard although it still appeared to be working to adapt to the new drive (the blue lights are still across the bottom and it is blinking green and red).
It is now 4 days and everything is still blinking and I occasionally hear the fans and drives working but this is still going on. When should I start worrying? What happens if a power failure occurs while this is occurring?