Data Protection in Progress for Two Weeks

We have a Drobo B800i with 8 x 3TB drives. Two weeks ago it went into Data Protection mode. We redirected all file I/O to other storage so the Drobo wouldn’t be disturbed while it was recovering. After 8 days it completed, but immediately went back into Data Protection Mode. Again after 5 days it completed and started again. Now when I got into work this morning I see it has completed and started yet again.

Any suggestions as to how to break out of this cycle?

Update: After 16 days it finally finished it’s data protection, and now it tells me I have a failed drive… which is fine. I can replace it with a new one.