Quick Summary
The Synology DS1621+ NAS Server is a network storage device with built-in M.2 slots for NVMe SSD cache and support for expansion up to 16 drives with two DX517 expansion units. It is presented as a performance-focused storage platform for users who want to grow capacity and improve responsiveness over time.
The unit is also described as ready for 10GbE expansion with a 10GbE SFP+ or RJ-45 NIC, which means network bandwidth can be increased by adding the relevant card to match existing infrastructure.
Who It Is Best For
This model suits buyers who want a NAS they can expand later, use SSD cache without occupying drive bays, and connect to a faster network when needed. It also fits users who back up data from clouds, Windows PCs and servers, virtual machines, or data stored on the NAS.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Model | DS1621+ for clear product identification when comparing storage options. |
| Product type | NAS Server for network storage use. |
| NVMe SSD cache | Dual built-in M.2 slots allow SSD cache without using drive bays. |
| Expansion | Supports scale-up to 16 drives with two DX517 expansion units. |
| Network upgrade | Can be fitted with a 10GbE SFP+ or RJ-45 NIC to increase network bandwidth. |
| Backup support | Works with Synology Active Backup suite, Hyper Backup and Snapshot Replication for data protection tasks. |
Why Buyers Choose It
- Dual built-in M.2 slots let you add NVMe SSD cache without giving up drive bays.
- Support for up to 16 drives with two DX517 expansion units gives room to grow storage later.
- 10GbE upgrade support makes it easier to match a faster existing network setup.
- Backup tools for clouds, PCs, servers, virtual machines and NAS data support broader protection workflows.
What To Know Before You Buy
Check that the DS1621+ matches your storage plan, especially if you expect to expand beyond the base unit. If you want faster networking, confirm whether your setup needs a 10GbE SFP+ or RJ-45 NIC. Also review whether NVMe SSD cache is part of your intended setup, since it uses the two built-in M.2 slots.
Pros: Built-in M.2 slots support SSD cache without using drive bays.
Cons: Expansion to 16 drives depends on adding two DX517 expansion units.
Common Buyer Questions
Can this NAS be expanded?
Yes. It supports scale-up to 16 drives with two DX517 expansion units.
Does it support SSD cache?
Yes. It has dual built-in M.2 slots for NVMe SSD cache.
Can the network connection be upgraded?
Yes. It is ready for 10GbE expansion with a 10GbE SFP+ or RJ-45 NIC.
What kind of backup use is it aimed at?
It is described for backing up data to and from public clouds, Windows PCs and servers, virtual machines and data on the NAS.
Final Buying View
The DS1621+ is a storage server for buyers who want expansion options, SSD cache support and the ability to add faster networking later. Review the expansion plan, cache setup and network card choice before ordering.
