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Synology DiskStation DS1821+ High capacity storage and data protection for anyone

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Synology DiskStation DS1821+ High capacity storage and data protection for anyone

CPU: AMD Ryzen V1500B 4-core 2.2 GHz, RAM: 4 GB DDR4 ECC SODIMM (Max 32 GB), Gigabit LAN Port x4, USB3.0 x4, eSATA Port x2, Gen3 x8 slot (x4 link) x1, M.2 Drive Slots (NVMe) x2, 3 Years Warranty

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DiskStation DS1821+

High capacity storage and data protection for anyone

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.

Download Datasheet

CPU

AMD Ryzen^™
Quad-core 2.2 GHz

Cache Acceleration

Dual M.2 2280 slots for NVMe Cache

Performance

113K 4K random read IOPS¹

Scalability

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.¹

Synology Drive

Moments

Web Server

Transfer Performance

Turbocharge and supersize it

networking or for higher storage capacity.

HDD/SSDs, 10GbE network adapter cards, and expansion units are sold separately.

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.
Learn more

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.
Learn more

Drive Package

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

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.
Microsoft 365 G Suite

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. Learn more

Powered by Synology DSM

Central Management System

Manage multiple Synology NAS servers simultaneously on a centralized interface to increase business efficiency.

Learn more

Synology MailPlus

Secure, reliable, and private mail server solution with an intuitive and modern mail client.

Learn more

Synology High Availability

Seamless transition between clustered servers in the event of a server failure to minimize the impact on applications.

Learn more

Security

Comprehensive built-in security tools are constantly updated to protect your devices against evolving threats.

Learn more

Synology Drive

A versatile solution for file management and synchronization.

Learn more

Surveillance Station

Complete surveillance solution for recording, monitoring, and management.

Learn more

Works best with Synology solid-state drives

Engineered to handle intensive 24/7 workloads, Synology SSDs are designed to provide consistent high-performance.

SATA 2.5” SSD SAT5200

NVMe M.2 SSD SNV3400

1 Status indicator
2 Alert indicator
3 Power button and indicator
4 LAN indicator

5 Drive status indicator
6 Drive tray
7 Drive tray lock
8 USB 3.2 Gen 1 port

9 Power port
10 System fan
11 PCIe expansion slot
12 Kensington Security Slot

13 Expansion port
14 1GbE RJ-45 port
15 Reset button
16 USB 3.2 Gen 1 port

Notes:

Performance figures are achieved in the Synology lab with optimized network and configuration settings. Actual performance could vary in different environments. Comparison done against prior-generation 8-bay DS1819+. For full details on the test setup, please visit the Synology performance page here.

Hardware Specifications

CPU	CPU Model	AMD Ryzen V1500B
	CPU Architecture	64-bit
	CPU Frequency	4-core 2.2 GHz
	Hardware Encryption Engine (AES-NI)
Memory	System Memory	4 GB DDR4 ECC SODIMM
	Memory Module Pre-installed	4 GB (4 GB x 1)
	Total Memory Slots	2
	Maximum Memory Capacity	32 GB (16 GB x 2)
	Notes	Please select Synology memory modules for optimum compatibility and reliability. Synology will not provide complete product warranty or technical support if non-Synology memory modules are used for memory expansion. Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance.
Storage	Drive Bays	8
	Maximum Drive Bays with Expansion Unit	18 (DX517 x 2)
	M.2 Drive Slots	2 (NVMe)
	Compatible Drive Type* (See all supported drives)	3.5" SATA HDD 2.5" SATA HDD 2.5" SATA SSD M.2 2280 NVMe SSD
	Maximum Single Volume Size*	108 TB
	Hot Swappable Drive
	Notes	"Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay. Storage Pool and volume creation require all drives to be listed as compatible on the device model's compatibility list. Each internal volume (may consist of multiple drives) is expandable up to 108TB.
External Ports	RJ-45 1GbE LAN Port	4 (with Link Aggregation / Failover support)
	USB 3.0 Port	4
	eSATA Port	2
PCIe	PCIe Expansion	1 x Gen3 x8 slot (x4 link)
File System	Internal Drives	Btrfs EXT4
	External Drives	Btrfs EXT4 EXT3 FAT NTFS HFS+ exFAT*
	Notes	exFAT Access is purchased separately in Package Center.
Appearance	Size (Height x Width x Depth)	166 mm x 343 mm x 243 mm
	Weight	6 kg
Others	System Fan	120 mm x 120 mm x 2 pcs
	Fan Speed Mode	Full-Speed Mode Cool Mode Quiet Mode
	Easy Replacement System Fan
	Brightness Adjustable Front LED Indicators
	Power Recovery
	Noise Level*	22.2 dB(A)
	Scheduled Power On / Off
	Wake on LAN / WAN
	Power Supply Unit / Adapter	250 W
	AC Input Power Voltage	100 V to 240 V AC
	Power Frequency	50/60 Hz, Single Phase
	Power Consumption*	59.8 W (Access) 26.18 W (HDD Hibernation)
	British Thermal Unit	204.05 BTU/hr (Access) 89.33 BTU/hr (HDD Hibernation)
	Notes	Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s). Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
Temperature	Operating Temperature	0°C to 40°C (32°F to 104°F)
	Storage Temperature	-20°C to 60°C (-5°F to 140°F)
	Relative Humidity	5% to 95% RH
Certification	FCC CE BSMI EAC CCC KC VCCI RCM
Warranty	3-year hardware warranty, extendable to 5-year coverage - EW201
	Notes	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment	RoHS Compliant
Packaging Content	Main Unit X 1 Accessory Pack X 1 AC Power Cord X 1 RJ-45 LAN Cable X 2 Quick Installation Guide X 1
Optional Accessories	DDR4 ECC SODIMM: D4ES01-4G/D4ES01-8G/D4ECSO-2666-16G Expansion Units: DX517 2.5" SATA SSD: SAT5200 M.2 2280 NVMe SSD: SNV3400 10GbE Network Interface Card: E10G18-T2/E10G18-T1/E10G17-F2 VisualStation: VS960HD/VS360HD Surveillance Device License Pack
	Notes	All memory modules will operate at the maximum frequency specified by the CPU manufacturer.

Notes:

Model specifications are subject to change without prior notice.
The figures are based on Synology internal testing. Each performance test is done individually. No other services or applications are processed at the same time.
The actual performance may be lower than lab testing figure due to differences in server configuration, deployment, and the number of active operations.
If usage requirements exceed the above recommended specifications, please contact us.

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