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RS3621XS+
SYNOLOGY 12BAY RACKSTATION RS3621XS+ DISKLESS
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RS3621XS+ is an enterprise-class SAN designed as a 36-bay storage system supporting SATA HDD, SAS HDD, SATA SSD, and NVMe SSD drive types. It offers a total storage capacity of up to 1 PB with RAID configurations including RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10, powered by an Intel Xeon processor featuring 8 cores and pre-installed 16 GB of ECC DDR4 memory, upgradeable to a maximum of 128 GB for robust performance.
RS3621XS+ delivers high-speed connectivity with 10GbE network ports, 4 LAN ports, and USB 3.2 interfaces, while also providing expansion capabilities for additional storage. Its redundant power supply rated at 750W and redundant fan cooling ensure reliability and uptime, making it ideal for use cases such as SMB backup, enterprise data centers, virtualization, and media server applications.
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| RS3621XS+ |  DS1621+ |  DS218PLAY |  RS2418RP+ |  VS360HD | |
|---|---|---|---|---|---|
| Product Type | Storage System | Storage System | Storage System | Storage System | Storage System |
| Storage Type | SAN | NAS | NAS | NAS | NAS |
| Form Factor | Rackmount | Desktop | Desktop | Rackmount | Rackmount |
| Bay Count | 36-bay | 6-bay | 2-bay | 24-bay | 16-bay |
| Supported Drive Types | SATA HDD / SAS HDD / SATA SSD / NVMe SSD | Mixed | SATA HDD / SATA SSD | Mixed | Mixed |
| Hot-Swap Support | Yes | Yes | Yes | Yes | Yes |
| Max Supported Capacity | 1 PB | 96 TB | 32 TB | 192 TB | 512 TB |
| RAID Support | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 / JBOD | RAID 0 / RAID 1 / JBOD | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 / RAID 50 / RAID 60 / JBOD | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 |
| CPU Type | Intel Xeon | AMD Ryzen | Realtek | Intel Xeon | Intel Xeon |
| CPU Cores | 8 | 4 | 4 | 4 | 8 |
| Installed RAM | 16 GB | 4 GB | 2 GB | 8 GB | 16 GB |
| Max RAM Capacity | 128 GB | 32 GB | 4 GB | 128 GB | 128 GB |
| RAM Type | ECC DDR4 | ECC DDR4 | DDR4 | ECC DDR4 | ECC DDR4 |
| Network Ports | 10GbE | 1GbE | 1GbE | 10GbE | 10GbE |
| LAN Ports | 4 | 4 | 1 | 2 | 2 |
| USB Ports | USB 3.2 | USB 3.2 | USB 3.0 | USB 3.0 | USB 3.2 |
| Expansion Support | Yes | Yes | No | Yes | Yes |
| Cooling | Redundant Fan | Active | Active | Active | Redundant Fan |
| Power Supply | Redundant | Single | Single | Redundant | Redundant |
| Power Supply Wattage | 750W | 250W | N/A | 750W | 500W |
| Operating System | Custom OS | QTS | QTS | QTS | Custom OS |
| Snapshot Support | Yes | Yes | Yes | Yes | Yes |
| Cloud Sync Support | Yes | Yes | Yes | Yes | Yes |
| Virtualization Ready | Yes | Yes | Yes | Yes | Yes |
| iSCSI Support | Yes | Yes | Yes | Yes | Yes |
| Surveillance Support | No | Yes | Yes | Yes | No |
| Use Case | Enterprise Data Center / Virtualization / Media Server / SMB | SMB / Enterprise Data Center / Media Server / Virtualization | SMB / Media Server | Enterprise Data Center | Enterprise Data Center |
| Product Name | RS3621XS+ | QNAP TS-DS1621+ | TS-DS218PLAY | QNAP TS-RS2418RP+ | VS360HD Storage System |
| Height | 3.5 | 6.81 inches | 6.6 inches | 4.4 inches | 3.5 inches |
| Width | 17.3 | 9.06 inches | 4.0 inches | 17.3 inches | 17.3 inches |
| Depth | 28.5 | 12.01 inches | 8.9 inches | 28.9 inches | 28.7 inches |
| Weight | 85 | 14.3 lbs | 4.0 lbs | 66 lbs | 35 lbs |
Powerful 12-bay RackStation for enterprise storage. The Xeon processor handles our intensive virtualization and database workloads with ease.
Superior scalability and high-speed performance. This unit provides the professional reliability and massive capacity our growing data center requires.
Exceptional build quality and rock-solid stability. A top-tier NAS solution for businesses needing high-performance storage and reliable data protection.
Robust hardware that delivers impressive throughput. It consistently handles multiple simultaneous tasks without any compromise on system speed.
Outstanding 12-bay capacity for large archives. The RS3621XS+ is a trustworthy workhorse for mission-critical enterprise storage and backups.
Professional grade rackmount NAS with high-end features. It offers predictable performance and excellent longevity for our corporate network infrastructure.
Impressive speed and massive storage density. The ultimate choice for businesses requiring a high-performance and reliable 12-bay storage solution.
The Synology RS3621xs+ is a 12-bay rackmount NAS designed for enterprise use. “Diskless” means it ships without hard drives, allowing you to choose and install the drives that best fit your capacity and performance needs.
The RS3621xs+ has 12 drive bays that support 2.5” or 3.5” SATA HDDs and SSDs. You can also expand up to 36 drives by connecting two DX1215 expansion units.
With 12 bays and 18 TB drives, the RS3621xs+ supports up to 216 TB of raw storage. Using two DX1215 expansions, total raw capacity can exceed 648 TB.
It supports RAID 0, RAID 1, RAID 5, RAID 6, RAID 10, JBOD, and Synology Hybrid RAID (SHR) for flexible protection and efficient space usage.
The RS3621xs+ is powered by an AMD Ryzen V1500B quad-core 2.2 GHz CPU and 4 GB DDR4 ECC RAM (expandable to 32 GB via two SODIMM slots).
It includes four 1 GbE ports by default. Optional 10 GbE RJ-45 or 25 GbE SFP28 network cards are available to boost throughput and support link aggregation.
Yes. With its high-performance CPU, ECC memory, and iSCSI support, it’s ideal for VMware, Hyper-V, and Citrix environments, offering high IOPS and low latency.
Yes. The RS3621xs+ offers AES-NI hardware encryption for shared folders and volumes, ensuring secure data at rest with minimal performance impact.
Synology Active Backup for Business, Hyper Backup, Snapshot Replication, and Cloud Sync are all supported, providing comprehensive on-premises and cloud backup strategies.
Install your drives, connect to your network, power on, and launch Synology Assistant or navigate to find.synology.com in a browser. Follow the DSM setup wizard to configure volumes and services.
It runs DiskStation Manager (DSM), Synology’s intuitive Linux-based OS that includes file services, virtualization, multimedia, and advanced security features.
Yes. The RS3621xs+ is compatible with industry-standard 2.5”/3.5” SATA HDDs and SSDs. For best reliability, refer to Synology’s compatibility list before purchase.
Connect up to two DX1215 expansion units using the dedicated eSATA ports to add 12 bays each, for a total of 36 bays under one volume and management interface.
In typical operation with four HDDs installed, the RS3621xs+ consumes approximately 70 W. Power-saving features such as HDD hibernation further reduce energy usage.
Synology offers point-in-time Snapshot Replication, continuous data protection, and built-in Btrfs file-system support with integrity checks, self-healing, and rapid rollback.
The RS3621xs+ includes a 5-year limited warranty. Synology offers optional extended warranty, advanced replacement, and 24/7 technical support through its global network of partners.
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