We will be replacing 3 of the SSD drives in one of our servers November 23rd.  Despite this work being done on one of the backup servers, there is always a chance of things going wrong.  Spilling a red bull into the server, starting a small fire that quickly catches all 4 servers up in flames is really not too far out of the scope of our luck, soooooo, I'm putting everyone on standby that there may be a few minutes of downtime on Wednesday the 23rd as we take down one of the servers to swap out some drives :)