- 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

A POWERHOUSE ON ALL FRONTS
The DS1821+ can handle demanding application workloads and a greater number of concurrent usersExperience faster file indexing in Synology Drive, photo organization in Moments, and more responsive web services

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 VIRTUALIZATIO SOLUTIONOS
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

ENHINEERED FOR RELIABILITY, BACKED BY SYNOLOGY
DS1821+ is designed to reliably store your data and is backed by Synologys three-year hardware warranty
An optional two-year extended warranty is available in select regions for up to five years of coverage

POWERED BY SYNOLOGY DSM
Central Management System: Manage multiple Synology NAS servers simultaneously on a centralized interface to increase business efficiency
Synology MailPlus: Secure, reliable, and private mail server solution with an intuitive and modern mail client
Synology High Availability: Seamless transition between clustered servers in the event of a server failure to minimize the impact on applications
Security: Comprehensive built-in security tools are constantly updated to protect your devices against evolving threats
Synology Drive: A versatile solution for file management and synchronization
Surveillance Station: Complete surveillance solution for recording, monitoring, and management

WORKS BEST WITH SYNOLOGY SOLID STATE DRIVES
Engineered to handle intensive 24/7 workloads, Synology SSDs are designed to provide consistent high-performance

Hardware Specifications
CPU
CPU Model: AMD Ryzen V1500B
CPU Architecture: 64-bit
CPU Frequency: 4-core 2.2 GHz
Hardware Encryption Engine (AES-NI): Yes

MEMORY
System Memory: 4GB DDR4 ECC SODIMM
Memory Module Pre-installed: 4GB (4GB ×1)
Total Memory Slots: 2
Maximum Memory Capacity: 32GB (16GB ×2)

STORAGE
Drive Bays: 8
Maximum Drive Bays with Expansion Unit: 18 (DX517 ×2)
M.2 Drive Slots: 2 (NVMe)
Compatible Drive Type:
* 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: Yes

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× Gen3 x8 slot (x4 link)

FILE SYSTEM
Internal Drives: Btrfs, EXT4
External Drives: Btrfs, EXT4, EXT3, FAT, NTFS, HFS+, exFAT
exFAT Access is purchased separately in Package Center

APPEARANCE
Size (H×W×D): 166×343×243 mm
Weight: 6 kg

OTHERS
System Fan: 120×120 mm ×2 pcs
Fan Speed Mode: Full-Speed Mode, Cool Mode, Quiet Mode
Easy Replacement System Fan: Yes
Brightness Adjustable Front LED Indicators: Yes
Power Recovery: Yes
Noise Level: 22.2 dB(A)
Scheduled Power On / Off: Yes
Wake on LAN / WAN: Yes
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)

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

ENVIRONMENT
- RoHS Compliant

PACKAKING CONTENT
1× Main Unit
1× Accessory Pack
1× AC Power Cord
1× RJ-45 LAN Cable
1× Quick Installation Guide

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

DSM Specifications
STORAGE MANAGEMENT
Maximum Internal Volume Number: 64
SSD Read / Write Cache (White Paper): Yes
SSD TRIM: Yes
Supported RAID Type: Synology Hybrid RAID, Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10
RAID Migration: Basic to RAID 1, Basic to RAID 5, RAID 1 to RAID 5, RAID 5 to RAID 6
Volume Expansion with Larger HDDs: Synology Hybrid RAID, RAID 1, RAID 5, RAID 6, RAID 10
Volume Expansion by Adding a HDD: Synology Hybrid RAID, JBOD, RAID 5, RAID 6
Global Hot Spare Supported RAID Type: Synology Hybrid RAID, RAID 1, RAID 5, RAID 6, RAID 10

FILE SERVICES
File Protocol: CIFS/AFP/NFS/FTP/WebDAV
Maximum Concurrent CIFS/AFP/FTP Connections: 1000
Maximum Concurrent CIFS/AFP/FTP Connections (with RAM expansion): 2000
Windows Access Control List (ACL) Integration: Yes
NFS Kerberos Authentication: Yes

ACCOUNT & SHARED FOLDER
Maximum Local User Accounts: 2048
Maximum Local Groups: 256
Maximum Shared Folder: 512
Maximum Shared Folder Sync Tasks: 16

HIGH AVAILABILITY
Synology High Availability: Yes

LOG CENTER
Syslog Events per Second: 800

VIRTUALIZATION
VMware vSphere 6 with VAAI: Yes
Windows Server 2016: Yes
Windows Server 2019: Yes
Citrix Ready: Yes
OpenStack: Yes

GENERAL SPECIFICATIONS
Networking Protocols: SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers:
Google Chrome
Firefox
Microsoft Edge
Internet Explorer 10 onwards
Safari 10 onwards
Safari (iOS 10 onwards)
Google Chrome (Android 6.0 onwards)

Add-on Packages
Antivirus by McAfee (Trial): Yes
Central Management System: Yes
Document Viewer: Yes
exFAT Access (Optional): Yes
Video Station: Yes

SYNOLOGY CHAT
Maximum Users: 1500

DOWNLOAD STATION
Maximum Concurrent Download Tasks: 80

iSCSI MANAGER
Maximum iSCSI Target Number: 128
Maximum iSCSI LUN: 256
iSCSI LUN Clone/Snapshot, Windows ODX: Yes

SYNOLOGY MailPlus / MailPlus SERVER
Free Email Accounts: 5 (Licenses required for additional accounts)
Maximum Number of Concurrent Users: 150
Maximum Server Performance: 1.484.000 emails per day, approx. 45GB

MEDIA SERVER
DLNA Compliance: Yes

MOMENTS
Facial Recognition: Yes
Subject Recognition: Yes
Auto Color & Rotate: Yes
Moments Select: Yes

SNAPSHOT REPLICATION
Maximum Snapshots per Shared Folder: 1.024
Maximum of System Snapshots: 65.536

SURVEILLANCE STATION
-Maximum IP cam (Licenses required): 40 (including 2 Free License)
Total FPS (H.264):
* 1200 FPS @ 720p (1280×720)
* 1050 FPS @ 1080p (1920×1080)
* 600 FPS @ 3M (2048×1536)
* 440 FPS @ 5M (2591×1944)
* 320 FPS @ 4K (3840×2160)
- Total FPS (H.265):
* 1200 FPS @ 720p (1280×720)
* 1200 FPS @ 1080p (1920×1080)
* 1120 FPS @ 3M (2048×1536)
* 600 FPS @ 5M (2591×1944)
* 480 FPS @ 4K (3840×2160)

SYNOLOGY DRIVE
Recommended Number of Hosted Files: 1.000.000 (applies to files indexed or hosted by Synology Drive (For file access through other standard
protocols, refer to the File Services section above)
Recommended Number of Concurrent Sync Clients: 550 (the number of connections that can be maintained when the recommended number of hosted files
was reached)

SYNOLOGY OFFICE
Maximum Users: 1.800

VIRTUAL MACHINE MANAGER
Recommended Virtual Machine Instances: 8
Recommended Virtual DSM Number (Licenses required): 8 (including 1 Free License)

VPN SERVER
Maximum Connections: 30