I had plugged in 4 1TB drives into the drobo. Now I only have about 1.3TB data on it, so I removed the fourth drive to use somewhere else. I expected the drobo to reduce capacity from 2.7TB to 1.8 TB, which it did. Since then, it has the red light turned on for the empty slot, saying my data is not protected.
Why is the drobo not relaying the data so that it only uses 3 drives? The amount of data is well below the capacity of a 3 drive array.
Another detail I’d like to add: I have data on two different drobo volumes. They are both 2TB each, but both are less than 50% occupied currently.