5 Things to Know About the Synology DS1621+ NVMe Slots

The two M.2 NVMe slots are locked to cache duty only. Synology’s software prevents using them as primary storage volumes.

Read/write caching is the sole purpose of these slots. You can accelerate frequently accessed data, but not expand your storage pool.

The caching setup works well for its intended use. It speeds up access to hot data without needing extra drives.

Do not expect to install an operating system or apps on NVMe. The slots are strictly for cache, not for boot drives or application storage.

If you need more storage, use the six drive bays instead. The DS1621+ supports up to six SATA drives for your main storage pool.