Most home servers begin their lives using whatever storage connectivity happens to be built into a consumer motherboard. You plug drives into the onboard SATA ports, maybe enable a BIOS RAID option if you’re feeling spicy, and for a while everything works well enough. With only a few disks and lighter workloads, you can get by just fine with what your hardware gives you. The trouble is that home servers and home labs almost never stay that simple. They accumulate more drives, start running continuously, and slowly become responsible for data you actually care about.