Linux: Only two of four gluster servers are receiving write requests

I talked with some gluster admins concerning  an issue I had with only two of the four servers answering write requests.  I had originally created my cluster to only include two servers and two bricks. Even though I delete the original settings there is data store in gluster’s DHT(Distributed Hash Table). We proved this theory by having me create a new directory and then writing files into the new directory. The files dispersed as they were supposed to. The fix is to do a gluster volume rebalance on the volume with the issue. This did correct the problem.