Good to think about since drive failure is easily the #1 most likely failure case for a server. (#2 is power supply failure, but anecdotally that seems much rar

Good to think about since drive failure is easily the #1 most likely failure case for a server. (#2 is power supply failure, but anecdotally that seems much rarer in practice. Drives can and do fail regularly in my experience.) That's why I used a RAID mirror, so we'd have to lose two drives in one server before it mattered, e.g. the server is down. Ideally the RAID array would run degraded (unmirrored) until you can get remote hands or yourself down there to drop in a new drive. They are front-accessible drives in caddies so changing them is relatively easy, no need to re-rack the server.