M.2 is a solid-state drive (SSD) form factor primarily used as an operating system boot solution however depending on the endurance of the M.2 drives, they may also be suitable for read-intensive or mixed workloads.

Lenovo ThinkSystem servers support M.2 drives in one of three ways, depending on the server selected:
- One or two drives, mounted in an M.2 adapter, vertically in a dedicated slot
- Two or four drives, mounted horizontally in an M.2 adapter
- Installed directly on the system board

One example is the Dual M.2 Adapter, as shown in the following figure, with one 128GB M.2 drive partially inserted. The second M.2 drive is installed on the other side of the adapter.

Specification

Product
Product id	670824
Brand	Lenovo
Partnr	4XB7A17071
EAN/UPC code	889488510986
Features
SSD form factor	M.2
SSD capacity	240 GB
Interface	Serial ATA III
NVMe	N
Component for	Server/Workstation
Read speed	540 MB/s
Write speed	310 MB/s
Random read (4KB)	67000 IOPS
Random write (4KB)	40000 IOPS
Read latency	500 µs
Write latency	500 µs
TBW rating	657