Storage NAS Synology DiskStation DS1821+ 8-BAY (SNG-DS1821PLUS)

Storage NAS Synology DiskStation DS1821+ 8-BAY (SNG-DS1821PLUS)

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The Synology DS1821+ (SNG-DS1821PLUS) is an 8-bay desktop DiskStation designed to store and protect mission-critical business data. Its low-noise desktop form factor is well suited for both SOHO and SMB environments, delivering 177% higher 4K random read IOPS than its predecessor along with strong scalability.

Key Features of Synology DS1821+

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8 Drive Bays, Expandable to 18 Drives
Supports 8 x 3.5" or 2.5" SATA HDDs/SSDs, expandable up to 18 drives with two DX517 expansion units, supporting a maximum single volume size of up to 108TB.

Powered by a Quad-Core AMD Ryzen V1500B Processor
Driven by a 4-core AMD Ryzen V1500B processor at 2.2 GHz, with a hardware encryption engine (AES-NI) and 4GB of DDR4 ECC SODIMM memory (expandable up to 32GB).

Significant Performance Gains Over the Previous Generation
Delivers over 110,000 4K random read IOPS — a 177% improvement — along with 76% faster sequential write speeds compared to its predecessor, ideal for heavy workloads and multiple concurrent users.

Built-In M.2 NVMe SSD Cache Without Sacrificing Drive Bays
Equipped with two M.2 2280 slots for NVMe SSD cache, accelerating HDD arrays without occupying the main drive bays.

Networking Ready for 10/25GbE Upgrades
Equipped with four Gigabit Ethernet ports and a PCIe slot for optional 10GbE SFP+/RJ-45 or 25GbE SFP28 network cards, instantly boosting network bandwidth as your organization's needs grow.

Full Virtualization Support
Supports VMware vSphere 6 with VAAI integration to offload storage operations, Windows ODX for faster data transfer and migration, and OpenStack Cinder to turn the NAS into a block-based storage component, along with Virtual Machine Manager for running VMs directly on the device.

Multiple RAID Types for Data Protection
Supports RAID 0, 1, 5, 6, 10, Synology Hybrid RAID (SHR), Basic, and JBOD, offering flexibility based on performance and data protection needs.

Complete Backup Solution
Backs up critical data from public clouds, PCs, servers, virtual machines, and other Synology NAS devices through the Synology Active Backup suite, Hyper Backup, and Snapshot Replication in one package.

Versatile Server Roles
Can serve as an iSCSI target, large-scale file storage, email server, or domain controller, adapting flexibly to organizational needs.

Managed Through Synology DSM
Powered by DiskStation Manager (DSM) software, integrating backup applications into an intuitive interface with durable storage technologies to protect valuable data on any device.

Ideal Applications

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• SOHO and SMB businesses needing a powerful, scalable storage solution
• iSCSI target and virtualization systems
• Email servers and domain controllers
• Backup for PCs, servers, and virtual machines
• Multi-user environments with diverse workloads

Why Choose Synology DS1821+

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The Synology DS1821+ is an 8-bay DiskStation delivering 177% higher 4K random read IOPS than its predecessor, with built-in M.2 NVMe cache and scalability up to 18 drives. It's the ideal choice for SOHO and SMB businesses needing a powerful, flexible storage solution ready to support future data growth.