Quick Summary
The Synology DS1821+ is an 8-bay NAS in black with a V1500B quad-core 2.2 GHz processor. It is described as supporting expanded storage and network upgrades, with dual built-in M.2 slots for NVMe SSD cache and support for two DX517 expansion units to scale up to 18 drives.
The included software references backup and snapshot features for data across public clouds, Windows PCs and servers, virtual machines, and data stored on the NAS.
Who It Is Best For
This NAS suits buyers who want central storage with room to expand, especially where cache, backup, and network upgrade options matter. It is also relevant if you want to check expansion unit support and the option to add a 10GbE SFP+ or RJ-45 NIC.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Product | Synology DS1821+ NAS in black. |
| Drive bays | 8-bay design, so buyers can plan storage around eight installed drives. |
| Processor | V1500B quad-core 2.2 GHz processor. |
| M.2 slots | Dual built-in M.2 slots for NVMe SSD cache. |
| Expansion support | Supports two DX517 expansion units for up to 18 drives in total. |
| Network upgrade | Can be fitted with a 10GbE SFP+ or RJ-45 NIC to increase network bandwidth. |
| Backup software | Synology Active Backup Suite, Hyper Backup, and Snapshot Replication are referenced for protecting data. |
| Connectivity technology | USB is listed in the source information. |
| Memory type | DDR4 SDRAM is listed in the source information. |
What To Know Before You Buy
Check that you want an 8-bay NAS rather than a smaller unit, and review whether you plan to expand with DX517 units or use the built-in M.2 cache slots. If higher network bandwidth matters, confirm that your setup supports a 10GbE SFP+ or RJ-45 NIC.
One source detail lists hard disk size as 0.0 GB, so check the drive configuration you intend to use before ordering.
Common Buyer Questions
Can the storage be expanded?
Yes. Two DX517 expansion units are referenced, bringing the total capacity to 18 drives.
Does it support SSD cache?
Yes. It includes dual built-in M.2 slots for NVMe SSD cache.
Can the network be upgraded?
Yes. A 10GbE SFP+ or RJ-45 NIC can be added to increase network bandwidth.
What software features are mentioned?
Active Backup Suite, Hyper Backup, and Snapshot Replication are referenced for data protection tasks.
Final Buying View
If you want an 8-bay Synology NAS with expansion, cache, and network upgrade options, the DS1821+ gives you several verified planning points to compare against your storage and network needs. Check the drive setup and expansion path before ordering.
