Components & Storage
Software & Services
Synology 12 bay RackStation RS3621xs+ (Diskless)
$6,191.90
RackStation RS3621xs+
High-performance enterprise storage built for data accuracy and security.
Accelerate your business operations
The 12-bay RS3621xs+ is capable of delivering over 238K 4K random read IOPS and 5,819 MB/s sequential read throughput1— a true enterprise powerhouse. With full power supply redundancy, an 8-core processor, ECC memory, advanced snapshot technology, and file self-healing, the RS3621xs+ provides a reliable foundation to any data-driven business.
Compute
Intel Xeon D-1541 8-core 2.1 GHz
Networking
Built-in dual-port 10GbE
Memory
8 GB ECC DDR4 Up to 64 GB
Scalability
Up to 36 drive bays with RX1217(RP)
Storage you can trust
The RS3621xs+ keeps your data protected while you concentrate on delivering the best results to your customers — even when disaster strikes.
Redundant power
Dual PSUs provide protection against a PSU failure or accidental cord removal while hot-swappable fans allow them to be replaced without powering down the system.
Maximize service availability
Synology High Availability (SHA) pairs two identical units together creating an active-passive cluster with minute-level failover.
Next-generation file system
Btrfs prevents data corruption and reduces maintenance overheads with advanced storage technologies and optimized snapshots.
Tailored to your business
The RS3621xs+ includes two PCIe slots for performance, networking, and storage upgrades enabling it to adapt to any business environment2.
Double bandwidth
Upgrade network bandwidth in minutes by 2x or more with Synology’s range of 10GbE NICs.
SSD cache3
Boost read/write IOPS by up to 16 times by enabling SSD cache with our Synology M.2 NVMe adapter cards and SNV3500 SSDs or by installing one or more 2.5” SAT5200 SSDs.
Storage expansion
Quickly and easily scale up to 36 drives with two RX1217(RP) expansion units.
Hyper Backup
A comprehensive backup and recovery solution for securing data stored on Synology servers. Backup data locally, to another Synology device, rsync server, or cloud-based storage such as Google Drive, Dropbox, S3-compatible destinations, and Synology C2. Deduplication4, integrity checks, and incremental transfer technology reduce bandwidth and storage used.
Snapshot Replication
Easily schedule flexible point-in-time backups of shared folders and iSCSI LUNs with an RPO as low as 5 minutes and recovery in seconds. Set up replication and failover to other Synology storage systems for fast RTOs and minimal service disruption.
Active Backup Suite
Enables administrators to easily backup the entire IT infrastructure to their NAS, including Windows & Linux workstations and servers, file servers, VMware and Hyper-V virtual machines, and Microsoft 365 and Google Workspace accounts. Backups benefit from deduplication, multiversioning, and optimizations to reduce bandwidth and storage used.
Storage for virtualization
Synology iSCSI storage supports mainstream virtualization solutions with an easy management interface to enhance usability. VMware vSphere 6.5 and VAAI integration helps offload storage operations. Windows Offloaded Data Transfer (ODX) speeds up data transfer. OpenStack Cinder support turns your Synology NAS into a block-based storage component. Additionally, Synology Storage Console enables even more simplified storage provisioning and management options in VMware and Windows environments.
Complete surveillance solution
Synology Surveillance Station transforms the RS3621xs+ into a feature-packed Network Video Recorder solution. Support for up to 90 IP cameras5 and video analytics such as motion detection, no idle zone, foreign object detection, and anomaly detection cater to the most common surveillance scenarios.
Secure and private
AES-256 encryption adds additional security to the locally-stored footage.
Access from anywhere, anytime
Access recordings and live streams whenever you want using a web browser, desktop client, or the DS cam mobile app.
Real-time alerts
Email, SMS, or push notifications alert you when incidents occur or predefined conditions are met.
Works best with Synology drives
Engineered to handle intensive 24/7 workloads, Synology drives consistently deliver top-grade performance.
Powered by Synology DiskStation Manager
The RS3621xs+ runs Synology DiskStation Manager (DSM), the web-based operating system with applications and services designed specifically for businesses.
Central Management System
Conveniently manage your fleet of Synology NAS from a centralized console.
Synology Drive
Instantly access your NAS files across multiple devices whenever you want, wherever you are.
Collaboration Suite
Satisfy all team collaboration needs behind the safety of your own private cloud with Synology Office, Calendar, and Chat.
Virtual Machine Manager
Run various operating systems in isolated sandboxes. Seamlessly clone, store, and migrate virtual machines.
Security
Shield your Synology NAS from the most sophisticated threats with industry-leading security solutions.
Public Cloud Integration
Back up and synchronize data easily between public cloud accounts and your NAS.
RackStation RS3621xs+
1. Power button and indicator
2. Alert Off Button
3. Drive tray
4. Drive status indicator
5. Power Port
6. PSU Indicators & Alert Off Buttons
7. PSU fan
8. Console port
9. 1GbE/10GbE RJ-45 Ports
10. USB 3.2 Ports
11. Expansion port
12. PCIe expansion slot
13. Reset button
Notes:
1. Performance testing conducted by Synology with 10GbE NICs installed. Actual results may vary depending on system configuration, testing methods, and other environmental variables. Check the performance page for additional details.
2. Network adapter cards, expansion units, other PCIe add-in cards, and storage drives are sold separately. Refer to the compatibility list for compatible devices.
3. SSD cache can be enabled by using compatible 2.5″ SSDs or without occupying drive bays by installing Synology SNV3500 M.2 22110 NVMe SSDs using M2D20 or E10M20-T1 adapter cards, sold separately.
4. Users have reported total data size reductions of more than 50% when backing up multiple systems with deduplication technology.
5. Surveillance Station includes 2 free licenses. Connecting more cameras and devices requires additional licenses.
| Best Seller Ranking |
#21 in Rackmount NAS |
|---|---|
| Brand |
Synology |
| Model |
RS3621xs+ |
| Port RJ-45 |
2 x 10GbE + 4 x 1GbE |
| Port USB |
2 x USB 3.2 Gen 1 |
| HDD Interface |
12 x SATA (12 x Bay) |
| Form Factor |
12-Bay |
| Processor |
Intel Xeon D-1541 8-core (16-thread) 2.1GHz |
| Installed Memory |
8GB DDR4 |
| Max Memory Capacity |
64GB |
| Memory Slot |
4 |
| Included HDD Capacity |
Diskless System |
| Max Capacity |
216TB |
| Drive Compatibility |
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*** Check Synology compatibility list for supported drives.** SSD cache can be enabled by using Synology SAT5200 2.5" SSDs or without occupying drive bays by installing Synology SNV3500 NVMe SSDs using M2D20 or E10M20-T1 adapter cards ,sold separately |
| RAID |
RAID 0 ,1 ,5 ,6 ,10 ,JBOD ,Synology RAID F1 ,Basic |
| Supported Protocols |
SMB ,AFP ,NFS ,FTP ,WebDAV ,CalDAV ,iSCSI ,Telnet ,SSH ,SNMP ,VPN (PPTP ,OpenVPN ,L2TP) |
| Power |
100 V to 240 V AC ,50/60 Hz ,single phase |
| Power Consumption |
142.5 W (Access)72.76 W (HDD Hibernation) |
| Features |
High PerformanceUp to 238,273 random read IOPS and 5,819 MB/s sequential read performancePowerful ComputeHost multiple compute-intensive services with its 8-core Intel processorUpgradabilityTwo PCIe expansion slots allow for M.2 NVMe cache adapters and high-bandwidth network cardsRedundant PowerEnsure business continuity with two redundant power suppliesOn-demand ScalabilitySupports up to 36 drive bays using two RX1217(RP) |
| Usage |
Ultra high prerformance for large number of users |
| Temperature |
Operating temperature: 0°C to 35°C (32°F to 95°F)Storage temperature: -20°C to 60°C (-5°F to 140°F) |
| Humidity |
5% to 95% RH |
| Dimensions |
3.46" x 18.98" x 28.50" |
| Weight |
31.97 lbs. |
| Package Contents |
1 x RS3621xs+ main unit1 x Quick Installation Guide1 x Accessory pack2 x AC power cords |
| First Listed on Newegg |
September 23 ,2025 |
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