reducing capacity with drive failure

I have a drobo with 2 3tb drives a 2 tb drive, 1 tb drive and 250gb drive. The 250 has failed. With it being so small is there a way to remove it from the array?

You want to check the lights are all showing green before removing/replacing it.

I would also suggest that you check your usage, if it is too high, you’ll want to free up usage to about 70% or lower before removing this drive.