The Definitive Guide to mdraid, mdadm, and Linux Software RAID

Jul 31, 2025 · 12 min read · What Is mdraid? Core Concepts mdraid (often shortened to MD RAID or simply md) is the Linux kernel’s built‑in software RAID framework. It aggregates multiple block devices (drives, partitions, loopbacks, NVMe namespaces, etc.) into a single logical b...