Synology

Synology DS1821+ 8-Bay Diskstation NAS

Name: Synology DS1821+ 8-Bay Diskstation NAS (AMD Ryzen V1500B Quad-Core 2,2 GHz 4 GB DDR4 ECC SODIMM 4 x 1 GbE RJ-45 LAN-Port)
Brand: Synology
SKU: B0C75QQJ21

Status: Synology DS1821+ 8-Bay Diskstation NAS: Unavailable on Amazon as of 2026-10-18 10:20 UTC. SpecPicks has no in-stock listing with matching specs on file; the search below lists current offers. eBay sellers may still list this model new or used.

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Bottom line: The Synology DS1821+ 8-Bay Diskstation NAS: 8 drive bays, expandable to 18 via two DX517 expansion units; main trade-off: ships with only 4 GB RAM; heavy VM use needs upgrades.

Unavailable on Amazon as of 2026-10-18 10:20 UTC

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Currently unavailable on Amazon. Not the same product — 3 in-stock alternatives:

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View Current Price — $1,599.00

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Original listing (currently unavailable) → Compare to similar nas & home servers

By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-18

Mike Perry — Hardware researcher since 2014. For NAS and home-server hardware, synthesises manufacturer specs and independent reviews rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference. About the author →

Pros & Cons

Pros

✓ 8 drive bays, expandable to 18 via two DX517 expansion units
✓ AMD Ryzen V1500B quad-core 2.2 GHz runs VMs and file sharing
✓ Dual M.2 NVMe slots for SSD read/write cache
✓ 4x 1GbE ports support Link Aggregation and failover

Cons

✗ Ships with only 4 GB RAM; heavy VM use needs upgrades
✗ 1 GbE ports only, no built-in 10GbE (needs PCIe card)
✗ Diskless; 8 drives are bought separately, raising cost
✗ V1500B has no iGPU, so no hardware video transcoding

Manufacturer description

Designed for scalability and performance The 8-bay Synology DS1821+ is aimed at IT enthusiast and SMB customers looking for a powerful and scalable storage solution, its business-grade backup solutions keep users safe and protected from potential data loss, while major improvements to compute capabilities and throughput means workloads are finished faster than ever before. Synology iSCSI storage fully supports most virtualization solutions to enhance work efficiency with easy management interface. VMware vSphere 6 and VAAI integration helps offload storage operations and optimizes…

SpecPicks Verdict

SpecPicks scored Synology DS1821+ 8-Bay Diskstation NAS using a rating × review-volume × price-fit model applied to published specs and reviews across the nas & home servers category. Synology's nas & home servers lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for nas & home servers of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

8-bay NAS: The Synology DS1821+ is an 8-bay NAS, which means it can accommodate up to 8 hard drives or SSDs. This makes it a great option for businesses or individuals who need a lot of storage space.
AMD Ryzen CPU: The DS1821+ is powered by an AMD Ryzen quad-core processor, which provides excellent performance for a variety of tasks, including file sharing, virtualization, and multimedia streaming.
Dual M.2 NVMe slots: The DS1821+ has two M.2 NVMe slots, which can be used to add SSD cache for improved performance.
Expandable storage: The DS1821+ can be expanded up to 18 bays by connecting two DX517 expansion units.
Sophisticated software: The DS1821+ comes with a wide range of software applications, including file sharing, backup, virtualization, and multimedia streaming.

Full Specifications

Size	Diskless
Brand	Synology
Color	Enclosure
Material	Metal
Unit Count	1.0 Count
Model Number	DS1821+
Mounting Type	Rack Mount
Built-In Media	User manual, cable or connector.
Mfr Part Number	DS1821+
Compatible Devices	Server
Enclosure Material	Metal
Expandable storage	The DS1821+ can be expanded up to 18 bays by connecting two DX517 expansion units.
Dual M.2 NVMe slots	The DS1821+ has two M.2 NVMe slots, which can be used to add SSD cache for improved performance.
Is Assembly Required	No
Sophisticated software	The DS1821+ comes with a wide range of software applications, including file sharing, backup, virtualization, and multimedia streaming.
Item Dimensions D x W x H	9.57"D x 13.5"W x 6.54"H
Global Trade Identification Number	04711174723973
Full listing title	Synology DS1821+ 8-Bay Diskstation NAS (AMD Ryzen V1500B Quad-Core 2,2 GHz 4 GB DDR4 ECC SODIMM 4 x 1 GbE RJ-45 LAN-Port)

Ready to buy?

Amazon shows no buyable offer for Synology DS1821+ 8-Bay Diskstation NAS at the last check. A similar in-stock product is Synology DS225+ 2-Bay Diskstation NAS. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

View Similar — $1,599.00