Synology Rack Station RS3621xs+

Highlights

 High Performance

• Up to 238,273 random read IOPS and 5,819 MB/s sequential read performance1

 Powerful Compute

• Host multiple compute-intensive services with its 8-coreIntel® processor

 Upgradability

• Two PCIe expansion slots allow for M.2 NVMe cache adapters and high-bandwidth network cards2

Redundant Power

• Ensure business continuity with two redundant power supplies

 On-demand Scalability

• Supports up to 36 drive bays using two RX1217(RP)3

Warranty

• Comes with Synology's 5-year warranty4

Built to Handle Intensive Workloads

• Synology RackStation RS3621xs+ is built to deliver exceptional performance, flexibility, and scalability to meet the requirements of businesses.
•  Up to 238,273 4K random read IOPS and 5,819 MB/s sequential read performance for demanding workloads1
•  Featuring 12 drive bays supporting both SATA HDD/SSD 2.5/3.5" drives5, expandable to 36 bays using two Synology RX1217(RP) expansion units3

Optimized for Data Protection and Integrity

• Powered by Synology DSM, our unified data management operating system, and built upon the Btrfs file system, data stored on the RS3621xs+ is safely guarded by modern data protection technologies.

Advanced snapshot technology

• provides schedulable and near-instantaneous data protection of shared folders and LUNs

File and folder-level data restoration

• enables restoration of specificfiles or folders

 Flexible storage quota system

• helps admins effortlessly manage available space by specifying storage limits for shared folders

 File self-healing

• detects and recovers corrupted files using mirrored metadata and RAID configurations

 Inline compression

• compresses data before writing it to the drive, reducing write commands and optimizing storage space

Data Backup Solutions for IT Infrastructure

Synology Active Backup Suite

• is a collection of license-free backup solutions built to protect Windows PCs and servers, VMs, other fileservers, and cloud-based storage.

Active Backup for Business (ABB)

• consolidates backup tasks for physical and virtual environments and enables rapid restoration of files, entire physical machines, and VMs.

Active Backup for Google Workspace

• enables backup of Google Workspace data including Gmail, Contacts, Calendar, and Drive.

Active Backup for Microsoft 365

• enables backup of Microsoft 365 data including OneDrive for Business, SharePoint Online, emails, contacts, and calendar.

On-Premises Collaboration

• Synology's collaboration suite is a private SaaS for file sharing, concurrent document editing, emails, instant messaging, and more. By leveraging a private cloud infrastructure, it ensures data ownership while multilayered security enables secure multi-platform access.

Synology Drive

• allows data access, synchronization, on-demand file restoration, and backup.

Synology MailPlus

•  provides a secure, reliable, and private email server.

Synology Chat

• brings teams together through instant multi-platform communication.

Synology Calendar

• helps teams keep track of what is most important with convenient calendar sharing and scheduling. 

Private Video Surveillance

• With Synology Surveillance Station, the RS3621xs+ becomes a powerful Network Video Recorder solution with support for up to 90 IP cameras8.
•  7,900+ supported camera models
• ONVIF support to prevent vendor lock-in
•  Private, subscription-free storage of the recordings
•  Access through web browser, dedicated desktop clients, or mobile app
•  Event-based rules to trigger specific actions
•  Email, SMS, or push notification systems

Technical Specifications 

Hardware 

CPU

• Intel® Xeon® D-1541 8-core (16-thread) 2.1 GHz, Turbo Boost up to 2.7 GH

Hardware encryption engine

• Yes (AES-NI) 

Memory

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

Compatible drive types

•  12 x 3.5" or 2.5" SATA HDD/SSD (drives not included)
•  It is strongly recommended that you only install drives listed on your device's compatibility list5.
• Storage pool and volume  creation processes may fail when using unverified drives.
• Synology is unable to provide technical support for devices  using unsupported components.

Hot swappable drive

• Yes

External ports 

• 2 x USB 3.2 Gen 1 ports
•  2 x Expansion ports (Infiniband)

Form factor

• Rackmount 2U

Size (HxWxD)

• 88 x 482 x 724 mm (with server handles)

Weight

• 14.5 kg

LAN ports

•  4 x 1GbE RJ-45
•  2 x 10GbE RJ-45

Wake on LAN/WAN

• Yes

PCIe 3.0 slots 

• 2 x 8-lane x8 slots
• Supports 10GbE/25GbE network interface cards2 and M.2 NVMe SSD adapter cards for SSD cache9

Scheduled power on/off

• Yes

System fans

• 4 x (80 x 80 x 32 mm)

AC input power voltage

• 100 V to 240 V AC

Power frequency

• 50/60 Hz, single phase

Operating temperature

• 0°C to 35°C (32°F to 95°F)

Storage temperature

• -20°C to 60°C (-5°F to 140°F)

Relative humidity

• 5% to 95% RH

Maximum operating altitude

• 5,000 m (16,400 ft)

General DSM Specification

Networking protocols

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

File systems

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

Supported RAID types

• Synology RAID F1, Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10

Storage management

• Maximum single volume size: 108/200 TB11
•  Maximum system snapshots: 65,53612
•  Maximum internal volumes: 256

SSD cache

•  Read/write cache support
•  2.5" SATA SSD support
•  M.2 NVMe SSD support9

File sharing capabilities

• Maximum local user accounts: 16,000
•  Maximum local groups: 512
•  Maximum shared folders: 512
•  Maximum concurrent SMB/NFS/AFP/FTP connections: 2,00013

Privileges

• Windows Access Control List (ACL), application privileges

Directory services

• Connects with Windows® AD/LDAP servers enabling domain users to login via SMB/NFS/AFP/FTP/File Station using their existing credentials.

Virtualization

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

Security

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

Supported clients

• Windows 7 onwards, macOS 10.12 onwards

Supported browsers Chrome

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