M.2 is a solid-state drive (SSD) form factor primarily used as an operating system boot solution. Lenovo ThinkSystem servers support M.2 drives with the addition of a supported M.2 adapter.
The M.2 drives install into an M.2 adapter which in turn is installed in a dedicated slot on the system board of the ThinkSystem server. With two M.2 drives configured, the drives are configured by default as a RAID-1 mirrored pair for redundancy.
There are two M.2 adapters supported: