Intel Xeon D-1531 6-core (12-thread) 2.2 GHz, Turbo Boost up to 2.7 GHz

CPU

Yes (AES-NI)

Hardware encryption engine

8 GB DDR4 ECC UDIMM (expandable up to 64 GB)

Memory

12 x 3.5" or 2.5" SATA HDD/SSD (drives not included)

Only drives listed on the compatibility list can be used to create storage pools

Only Synology SAT5200 2.5" or Synology SNV3500 series SSDs (sold reparately) can be used to create SSD caches

Compatible drive type

Yes

Hot swappable drive

2 x USB 3.2 Gen 1 ports

2 x Expansion ports (Infiniband)

External port

Rackmount 2U

Form factor

88 x 482 x 724 mm (with server handles)

Size (Height x Width x Depth)

14.5 kg

Weight

4 x 1GbE RJ-45

LAN port

Yes

Wake on LAN/WAN

2 x 8-lane x8 slots

Supports network interface cards and M.2 NVMe SSD adapter cards for SSD cache

PCIe 3.0 slot

Yes

Scheduled power on/of

4 x (80 x 80 x 32 mm)

System fan

100 V to 240 V AC

AC input power voltage

50 to 60Hz, single phase

Power Frequency

0°C to 35°C (32°F to 95°F)

Operating Temperature

-20°C to 60°C (-5°F to 140°F)

Storage Temperature

5% to 95% RH

Relative Humidity

5,000 m (16,400 ft)

Maximum operating altitude

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

Networking protocol

Internal: Btrfs, ext4

External: Btrfs, ext4, ext3, FAT32, NTFS, HFS+, exFAT

File system

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

Supported RAID type

Maximum single volume size: 108/200 TB

Maximum system snapshots: 65,536

Maximum internal volume: 128

Storage management

Read/write cache support

2.5" SATA SSD support

M.2 NVMe SSD support

SSD cache

Maximum local user account: 16,000

Maximum local group: 512

Maximum shared folder: 512

Maximum concurrent SMB/NFS/AFP/FTP connection: 2,000

File sharing capability

Windows Access Control List (ACL), application privileges

Privilege

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

Directory service

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

Virtualization

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

Security

Windows 7 onwards, macOS 10.12 onwards

Supported client

Chrome, Firefox, Internet Explorer 11 onwards, Safari 11 onwards; Safari (iOS 11 onwards), Chrome (Android™ 6.0 onwards)

Supported browser

Provide a universal portal to synchronize your files across various platforms, including Windows, macOS, Linux, Android™ and iOS. The built-in universal portal allows you to access data anytime and anywhere.

Maximum number of hosted files: 3,000,000

Maximum number of concurrent connections for PC clients: 1,800

Drive

Provides virtual drives, remote folders, Windows ACL editor, compression/extraction of archived files, bandwidth control for specific users/groups, creation of sharing links, and transfer logs.

File Station

Supports bandwidth control for TCP connections, custom FTP passive port ranges, anonymous FTP, FTP over TLS/SSL and SFTP protocols, network booting with TFTP and PXE support, and transfer logs.

FTP Server

Enables high-speed data transfer over WAN through the exclusive SITA technology between Synology NAS and desktop.

Presto File Server

Offers one or two-way synchronization 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 and Yandex Disk.

Cloud Sync

Enables global search of applications and files.

Universal Search

Maximum iSCSI target: 256

Maximum iSCSI LUN: 512

iSCSI LUN clone/snapshot support

iSCSI Manager

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

Virtual Machine Manager

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

Hyper Backup

DSM configuration backup, macOS® Time Machine® support, Synology Drive Client desktop application

Shared folder sync supports a maximum of 32 tasks

Backup tools

Maximum of shared folder snapshots: 1,024

Maximum of replication: 64

Snapshot Replication

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

Synology High Availability

Supports backup and restoration of Google Workspace My Drive, Team Drive, Gmail, Contacts, and Calendar.

Active Backup for G Suite

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

Active Backup for Microsoft 365

An all-in-one backup solution designed for heterogeneous business IT environments. It enables IT admins to remotely manage and protect PCs, servers, and VMs from one centralized console.

Active Backup for Business

Users can collaborate through the instant messaging service Synology Chat, the online editor Synology Office, and the scheduling assistant Synology Calendar.

Chat maximum user: 4,000

Office maximum user: 3,000

Calendar: support CalDAV and access via mobile devices

Collaboration tools

A note taking platform that supports rich text, note organization and versioning, encryption, sharing, media embedding, and attachments.

Note Station

A secure, reliable, and private mail solution featuring high-availability, load balancing, security, and filtering.

Synology MailPlus Server

An intuitive webmail interface for Synology MailPlus Server with customizable mail labels, filters, and user interface.

Synology MailPlus

A feature-rich photo management application that includes AI-powered album creation from facial and subject recognition, photo editing and sharing capabilities, similar photo detection for duplicate management, auto-editing functions such as color correction and angle adjustments, and auto-selection of the best shots. Mobile applications are available on iOS and Android™ devices.

Moments

Video Station, Photo Station, Audio Station, iTunes Server

Other packages

Maximum IP cameras: 75, for a total of 2,250 FPS at 720p (H.264)

Surveillance Station

Provide a flexible and cost-effective domain controller solution

Synology Directory Server

Provide a single interface to manage and monitor multiple Synology NAS

Central Management System

Maximum connection: 40

Supported VPN protocol: PPTP, OpenVPN™, L2TP/IPSec

VPN Server

Supported Mail Server protocols: POP3, SMTP, IMAP

LDAP/AD account support

Mail Server

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

Mail Station

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

Web Station

DNS Server, RADIUS Server, Log Center

Other packages

Displays 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, and least recently accessed files.

Storage Analyzer

Provides full system scans, scheduled scans, white list customization, and auto-update of virus definitions

Antivirus Essential

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

iOS/Android™ applications

Additional 3rd-party packages available on Package Center

Other packages

RoHS compliant

Environment safety

1 x RS3621RPxs main unit

1 x Quick Installation Guide

1 x Accessory pack

2 x AC power cords

Package content

DDR4 ECC UDIMM: D4EC-2666-16G/D4EC-2666-8G

RKS1317 Rail Kit

10GbE Network Interface Cards: E10G18-T2/E10G18-T1/E10G17-F2

M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1

M.2 SSD Adapter Card: M2D20

M.2 NVMe SSDs: SNV35009

2.5" SATA SSD: SAT5200

3.5" SATA HDD: HAT5300

Expansion Unit: RX1217(RP)

VisualStation units: VS960HD, VS360HD

Surveillance Device License Pack

MailPlus License Pack

Virtual DSM License Pack

Optional accessories