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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)
Synology

Synology DS1821+ 8-Bay Diskstation NAS

Status: Synology DS1821+ 8-Bay Diskstation NAS: Unavailable on Amazon as of . 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 bays hold up to 8 HDDs/SSDs; expandable to 18 via two DX517 units; main trade-off: only 4GB DDR4 ECC out of the box; heavy VMs need a RAM upgrade.

Unavailable on Amazon as of

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Currently unavailable on Amazon. Not the same product — an in-stock alternative:

Similar: SYNOLOGY DS925+ 4-Bay DiskStation — $769.99 on Amazon as of 2026-10-21 12:20 UTC (price may vary).

View Current Price — $769.99
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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For external drives and portable storage, synthesises manufacturer specs and independent reviews rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ 8 bays hold up to 8 HDDs/SSDs; expandable to 18 via two DX517 units
  • ✓ AMD Ryzen V1500B quad-core 2.2 GHz for virtualization and file sharing
  • ✓ Dual M.2 NVMe slots add SSD cache without using a drive bay
  • ✓ Four 1GbE RJ-45 ports support Link Aggregation and failover

Cons

  • ✗ Only 4GB DDR4 ECC out of the box; heavy VMs need a RAM upgrade
  • ✗ Four 1GbE ports, no built-in 10GbE (requires an add-in card)
  • ✗ V1500B has no integrated GPU for hardware video transcoding
  • ✗ 8-bay chassis is large and heavy for a home shelf

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…

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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 external storage category. Synology's external storage 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 external storage 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

SizeDiskless
BrandSynology
ColorEnclosure
MaterialMetal
Unit Count1 Count
Model NumberDS1821+
Mounting TypeRack Mount
Built-In MediaUser manual, cable or connector.
Mfr Part NumberDS1821+
Compatible DevicesServer
Enclosure MaterialMetal
Expandable storageThe DS1821+ can be expanded up to 18 bays by connecting two DX517 expansion units.
Dual M.2 NVMe slotsThe DS1821+ has two M.2 NVMe slots, which can be used to add SSD cache for improved performance.
Sophisticated softwareThe DS1821+ comes with a wide range of software applications, including file sharing, backup, virtualization, and multimedia streaming.
Item Dimensions D x W x H9.57"D x 13.5"W x 6.54"H
Global Trade Identification Number04711174723973
Full listing titleSynology 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 DS925+ 4-Bay DiskStation. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

View Similar — $769.99

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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)
Similar, in stock — $769.99 →