I recently got myself the Drobo 5N to upgrade from a Drobo FS. Since I wanted to use the new storage format, I purchased 2 8TB HDDs for the 5N and started to move files over from the old FS.
The FS had 2x 6TB and 3x 4TB HDDs which I partly wanted to move over to the new 5N. After starting to move many files and the 5N filling up I removed one of the 6TB HDDs from the FS and moved it to the 5N.
But now the FS is not rebuilding the system but stuck in “add a drive” and red error mode for the first drive I moved. It has 3 TB free space.
What can I do to force it to restart rebuilding so I can later move a second drive out of the old box?