Technical Specifications

Hardware

CPU

• AMD Ryzen V1500B quad-core 2.2 GHz

Hardware encryption engine

• Yes (AES-NI)

Memory

• 4 GB DDR4 ECC SODIMM (expandable up to 32 GB)

Compatible drive type

• 8 x 3.5″ or 2.5″ SATA HDD/SSD
  • Bundled with 24TB of storage capacity (includes 8 x 3TB Seagate IronWolf HDDs)
• 2 x M.2 2280 NVMe SSD (drives not included)

Hot swappable drive

• Yes

External port

• 4 x USB 3.2 Gen 1
• 2 x eSATA

Size (H x W x D)

• 166 x 343 x 243 mm

Weight

• 6.0 kg

LAN port

• 4 x 1GbE RJ-45

Wake on LAN/WAN

• Yes

PCIe 3.0 slot

• 1 x 4-lane x8 slot
• Supports 10GbE network interface cards (sold separately)

Scheduled power on/off

• Yes

System fan

• 2 (120 x 120 x 25 mm)

AC input power voltage

• 100 V to 240 V AC

Power frequency

• 50/60 Hz, single phase

Operating temperature

• 0ºC to 40ºC (32ºF to 104ºF)

Storage temperature

• -20ºC to 60ºC (-5ºF to 140ºF)

Relative humidity

• 5% to 95% RH

Maximum operating altitude

• 5,000 m (16,400 ft)

General DSM specification

Networking protocol

• SMB, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, VPN (PPTP, OpenVPNTM, L2TP)

File system

• Internal: Btrfs, ext4
• External: Btrfs, ext4, ext3, FAT32, NTFS, HFS+, exFAT10

Supported RAID type

• Synology Hybrid RAID (SHR), Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10

Storage management

• Maximum single volume size: 108TB
• Maximum system snapshots: 65,53611
• Maximum internal volume: 64

SSD cache

• Read/write cache support
• M.2 NVMe SSD support

File sharing capability

• Maximum local user account: 2,048
• Maximum local group: 256
• Maximum shared folder: 512
• Maximum concurrent SMB/NFS/AFP/FTP connection: 1,000

Privilege

• Windows Access Control List (ACL), application privileges

Directory service

• Windows AD integration: Domain users login via SMB/NFS/AFP/FTP/File Station, LDAP integration

Virtualisation

• VMware vSphere 6.5, Microsoft Hyper-V, Citrix, OpenStack

Security

• Firewall, shared folder encryption, SMB encryption, FTP over SSL/TLS, SFTP, rsync over SSH, login auto block, Let’s Encrypt support, HTTPS (customisable cipher suite)

Supported client

• Windows 7 onwards, macOS 10.12 onwards

Supported browser

• Chrome, Firefox, Edge, Internet Explorer 10 onwards, Safari 10 onwards, Safari (iOS 10 onwards), Chrome (AndroidTM 6.0 onwards) on tablets

Interface language

• English
• German
• French
• Italian
• Spanish
• Danish
• Norwegian
• Swedish
• Dutch
• Russian
• Polish
• Hungarian
• Portuguese (Brazil)
• Portuguese (Europe)
• Turkish
• Czech
• Thai
• Japanese
• Korean
• Chinese (Traditional)
• Chinese (Simplified)

Packages and Applications

File Server & Synchronisation

Drive

• Provide a universal portal to synchronise your files across various platforms, including Windows, macOS, Linux, AndroidTM and iOS. The built-in universal portal allows you to access data anytime and anywhere.
  • Maximum number of hosted files: 1,000,000
  • Maximum number of concurrent connections for PC clients: 550

File Station

• Virtual drives, remote folders, Windows ACL editor, compressing/extracting archived files, bandwidth control for specific users/groups, creating sharing links, transfer logs

FTP Server

• Bandwidth control for TCP connections, custom FTP passive port range, anonymous FTP, FTP SSL/TLS and SFTP protocol, boot over the network with TFTP and PXE support, transfer logs

Presto File Server

• High-speed data transfer over WAN with exclusive SITA technology between Synology NAS and desktop

Cloud Sync

• One or two-way synchronisation with public cloud storage providers including Alibaba Cloud OSS, Amazon S3-compatible storage, Backblaze B2, Baidu Cloud, Box, Dropbox, Google Cloud Storage, Google Drive, hubiC, MegaDisk, Microsoft OneDrive, OpenStack Swift-compatible storage, Tencent COS, WebDAV servers, Yandex Disk

Universal Search

• Offer global search into applications and files

iSCSI Storage & Virtualisation

iSCSI Manager

• Maximum iSCSI target: 128
• Maximum iSCSI LUN: 256
• iSCSI LUN clone/snapshot support

Virtual Machine

• Manager Deploy and run various virtual machines on Synology NAS, including Windows, Linux, or Virtual DSM

Data Protection & Backup Solution

Hyper Backup

• Support local backup, network backup, and data backup to public clouds

Backup tools

• DSM configuration backup, macOS Time Machine support, Synology Drive Client desktop application
• Shared folder sync – maximum task number: 16

Snapshot Replication

• Maximum of shared folder snapshots: 1,024
• Maximum of replication: 32

Synology High Availability

• Reduce service downtime by setting up two identical NAS into one high-availability cluster

Active Backup for G Suite

• Support G Suite My Drive and Team Drive backup and restoration

Active Backup for Microsoft 365

• Supports Microsoft 365 OneDrive for Business, mail, contacts, and calendar backup and restoration

Active Backup for Business

• All-in-one backup solution designed for heterogeneous business IT environment, enabling IT admins to remotely manage and monitor protection over PC, servers and VM on one centralised console

Productivity & Collaboration

Collaboration tools

• Collaborate with instant message service Synology Chat, online editor Synology Office, and scheduling assistant Synology Calendar
  • Chat maximum user: 1,500
  • Office maximum user: 1,800
  • Calendar: support CalDAV and access via mobile devices

Note Station

• Rich-text note organisation and versioning, encryption, sharing, media embedding and attachments

Synology MailPlus Server

• Secure, reliable, and private mail solution with high-availability, load balancing, security and filtering design (includes 5 free email account licences; additional accounts require the purchasing of additional licences)

Synology MailPlus

• Intuitive webmail interface for Synology MailPlus Server, customisable mail labels, filters, and user interface

Multimedia

Moments

• Support smart AI album with facial and subject recognition, photo editing and sharing features, similar photo detection, auto-editing functions such as colour correction and angle adjustments, and AI selection of the best photos. Mobile applications are available on iOS and Android devices

Other packages

• Video Station, Photo Station, Audio Station, iTunes Server

Surveillance

Surveillance Station

• Maximum IP camera: 40 (total of 1,200 FPS at 720p, H.264) (Including two free camera licences. Additional cameras require the purchasing of additional licences)

All-in-One Server

Synology Directory Server

• Provide a flexible and cost-effective domain controller solution

Central Management System

• Provide a single interface to manage and monitor multiple Synology NAS

VPN Server

• Maximum connection: 30. Supported VPN protocol: PPTP, OpenVPNTM, L2TP/IPSec

Mail Server

• Supported Mail Server protocol: POP3, SMTP, IMAP. LDAP/AD account support

Mail Station

• Webmail interface for Mail Server to receive emails from multiple POP3 mailboxes, customisable SMTP server

Web Station

• Virtual host (up to 30 websites), PHP/MariaDB, 3rd-party applications support

Other packages

• DNS Server, RADIUS Server, Log Centre

Others

Storage Analyser

• Volume and quota usage, total size of files, volume usage and trends based on past usage, size of shared folders, large files, most recently modified files, least recently accessed files

Antivirus Essential

• Full system scan, scheduled scan, white list customisation, virus definition auto update

iOS/Android applications

• Synology Drive, Synology MailPlus, Synology Chat, Synology LiveCam, Moments, DS audio, DS photo, DS video, DS cam, DS file, DS finder, DS note

Other packages

• Additional 3rd-party packages available on Package Centre

Environment and Packaging

Environment safety

• RoHS compliant

Package content

• 1 x DS1821+ Enclosure
• 8 x Seagate IronWolf Drives
• 1 x Quick Installation Guide
• 1 x Accessory pack
• 2 x Hard drive tray key
• 1 x AC power cord
• 2 x RJ45 LAN cable