Most datacenters offer remote hands, so there is no need to travel to the DC for those kinds of things (just ship them the drives and have them replace it). One

Most datacenters offer remote hands, so there is no need to travel to the DC for those kinds of things (just ship them the drives and have them replace it). One can also easily add extra spare hard drives to the pool that ZFS or mdraid can automatically put into production in case of drive failure, so there is no need for active intervention after each drive failure. And if any downtime for upgrades is unacceptable one can go for distributed storage solutions like ceph, seaweedfs or minio. Or simply 1:1 mirror everything to a second machine (which you want for disaster recovery anyway) and switch over during the maintenance period. And since for this specific usecase the server(s) would only serve as CDN origin, a brief downtime might even have very little actual impact.