Problems with my Drobo S

I have been having a problem with my Drobo lately. I have had two drives go out in the last month. I just replaced a drive with a new one and it did not last a week. It is telling me the drive is bad. I had a friend test the drives and he thinks they are good. Could the controller board of the Drobo S be bad?

It could, or the new drive might be SMR technology & “working as designed”… it appears Drobos don’t like SMR drives. Working only for a short while or reporting as failed (particularly during rebuilds or other heavy activity) seem to be symptoms of such drives being used, though they’ll test out perfectly when not in a Drobo. You didn’t say what make or model of drive you fitted.