- 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 users
- Experience 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