Synology 8 Bay Diskstation DS1821+ (Diskless)

Synology DS1821+

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DiskStation Plus Model DS1821+

UPC Code: 846504003976

Provantage Code:  SYNO0JX

Condition:  Factory New

  • Product Type: SAN/NAS Storage System
  • Standard Memory: 4 GB
  • Product Family: DiskStation Plus
  • Product Series: Plus
  • Processor Core: Quad-core (4 Core)
  • TAA Compliant: Yes

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StorageNetwork StorageVarious Network Storage Devices


Synology DS1821+ Specifications

    Synology 8 Bay Diskstation DS1821+ (Diskless)


    Rear View

    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.


    AMD Ryzen
    Quad-core 2.2 GHz

    Cache Acceleration

    Dual M.2 2280 slots for NVMe Cache


    113K 4K random read IOPS


    Expand up to 18 drives
    with two DX517 expansion units

    A powerhouse on all fronts

    The DS1821+ can handle demanding application workloads and a greater number of concurrent users. Experience faster file indexing in Synology Drive, photo organization in Moments, and more responsive web services.

    Turbocharge and supersize it

    networking or for higher storage capacity.

    2 x M.2 NVMe Enable ultra-fast NVMe cache to accelerate HDD arrays by 20X or more

    10GbE support Add in faster SFP+ or RJ-45 networking to turbocharge existing workflows

    Storage Expansion Supports two DX517 expansion units for a total of 18 bays

    Ultimate file management and sharing

    File Station is a web-based, fast and secure management tool built to allow easy, drag-and-drop operations without requiring any complex setup on Mac or PC. Advanced search and filtering tools allow for easy organization and file sharing. For complete compatibility, DS1821+ supports the following protocols: AFP, FTP, iSCSI, NFS, SMB, and WebDAV.

    Fully certified storage virtualization solutions

    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 computation efficiency. Windows Offloaded Data Transfer (ODX) speeds up data transfer and migration rate. OpenStack Cinder support turns your Synology NAS into a block-based storage component.

    Ultimate Backup Solution

    DS1821+ integrates various backup applications into an intuitive user interface, offering durable storage technologies to safeguard your valuable data on any device.

    Active Backup for Business

    Centralize backup tasks for VMware, Windows, and file servers. Restore whatever you want fast and reliably when needed.

    Hyper Backup

    Comprehensively back up your data to a local shared folder, an external device, another Synology NAS, an rsync server, or a public cloud to ensure data safety.

    Drive Package

    Safeguard your computer with Synology Drive Client. Effortlessly perform real-time data backups and point-in-time file recovery.

    Active Backup for Microsoft 365 / G Suite

    Protect corporate data stored on the cloud. On-premise backup solution with a centralized dashboard. Optimize storage efficiency with single instancing and block-level deduplication technology.

    Engineered for reliability, backed by Synology

    DS1821+ is designed to reliably store your data and is backed by Synology's three-year hardware warranty. An optional two-year extended warranty is available in select regions for up to five years of coverage.


    AFP  –  FTP  –  iSCSI  –  NFS  –  SMB  –  WEBDAV  –  SMB 1.0  –  CIFS  –  SMB 2.0  –  SMB 3.0  –  NFSv3  –  NFSv4  –  NFSv4.1  –  HTTP  –  HTTPS  –  SNMP  –  LDAP  –  CalDAV

Additional Product Images


Product NameSynology 8 Bay Diskstation DS1821+ (Diskless)
Product TypeSAN/NAS Storage System
Processor ManufacturerAMD
RAID SupportedYes
Ethernet TechnologyGigabit Ethernet
Number of Total Expansion Bays8
Number of Total Expansion Slots1
Network (RJ-45)Yes
Maximum Power Supply Wattage250 W
Product FamilyDiskStation Plus
Total Number of USB Ports4
Number of Hard Drives Supported8
Number of Hard Drives Installed0
Expansion Slot TypePCI Express 3.0 x8
Operating SystemDiskStation Manager
Form FactorDesktop
Processor Speed2.20 GHz
Processor TypeRyzen
RAID Levels0, 1, 5, 6, 10, Basic, Hybrid RAID, JBOD
Controller TypeSerial ATA
Standard Memory4 GB
Processor CoreQuad-core (4 Core)
Number of Power Supplies Installed1
Number of Network (RJ-45) Ports4
Number of USB 3.0 Ports4
Number of Solid State Drive Supported8
Number of Solid State Drive Installed0
Number of 2.5" / 3.5" Bays8
Processor ModelV1500B
Country of OriginTaiwan
Memory TechnologyDDR4 SDRAM
Product SeriesPlus
Product ModelDS1821+
Product LineDiskStation
Packaged Quantity1
Supplies/Accessories for Synology DS1821+

Synology 5 Bay Expansion Unit DX517 Diskless

Mfg Part# DX517

Synology 4GB Ram DDR4 ECC SODIMM

Mfg Part# D4ES01-4G

Synology Ram DDR4 2466 ECC 16G ECC Unbuffered SODIMM 260PIN 1.2V

Mfg Part# D4ECSO-2666-16G

Synology 10GB Ethernet Adapter 1 RJ45PORT E10G18-T1

Mfg Part# E10G18-T1

Synology Ram

Mfg Part# D4ES01-8G

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Synology DiskStation Plus Model DS1821+