My 4-bay Drobo with 4 WD Green 4.0 TB hard disks started flashing green/yellow on the 3 upper bays, and there was no light to the right of the 4th harddisk - the one at the bottom.
Drobo Dashboard said that bay 4 was empty. It wasn’t.
I let the flashing conitnue until Drobo was happy again. Solid green lights in the 3 upper bays and no light in the 4th bay.
Then I ejected the 4th harddisk, and inserted it again.
After a few seconds the flashing stated again. Now on bay 1, 2 and 4.
And Drobo Dashboard now claims bay 3 is empty !!!
After 12 hours the lighs were again solid green - except there was still no light in bay 3.
I unmounted Drobo and shut him down. Ejected all drivesand inserted them again, hoping it was a connection problem inside.
When I started Drobo up again only the two upper bays are active. And Dashboard reports that bay 3 and 4 are empty!
Them I took the drives out of bay 3 and 4 and attached them to another mac to reformat the drives. Strangely enough Disk Utility can easily see the drives, but sees them as 1.8 TB drives.
I have tried to repartition them and to delete them, but both of them are still seen as 1.8 TB drives.
Is there a way to get the lost space back?
I am afraid to re-inset the two drives in Drobo untill it has done its “Data Protection” wchich now - with only two drives inserted - is estimated to take 32 hours.
I don’t know what to do.
My plan is to let it finish the Data Protection routine, make a full backup, insert the two detatched drives and perhaps reformat the whole ting … hoping for a better result.
But I’d like to know if any other users have experienced something similar.
Any clues and hints will be appreciated. Including how to the the 4 TB dives to act as 4 TB drives and not 1.8 TB drives - I can’t figure out that has happened.