Synology 144TB RackStation RS3621xs+ 12-Bay NAS Enclosure Kit (12 x 12TB)

BH #SYRS3621XSPK (B&H Kit)
Synology 144TB RackStation RS3621xs+ 12-Bay NAS Enclosure Kit (12 x 12TB)
Key Features
  • 144TB Storage Capacity
  • 12 x 12TB 7200 rpm SATA III 3.5" HDDs
  • 2.1 GHz Intel Xeon D-1541 Eight-Core
  • 8GB of DDR4 ECC RAM
This B&H Kit combines the Synology RackStation RS3621xs+ 12-Bay NAS Enclosure with twelve Synology 12TB HAT5300 SATA III 3.5" Internal Enterprise HDDs for a storage capacity of 144TB.
In Stock
$817/mo. suggested payments for 12 Mos.
with the credit card.§ 
Protect Your Gear
Add a protection plan from $524.99

Synology RS3621xs+ External HDD Overview

This B&H Kit combines the Synology RackStation RS3621xs+ 12-Bay NAS Enclosure with twelve Synology 12TB HAT5300 SATA III 3.5" Internal Enterprise HDDs for a storage capacity of 144TB.

Synology RackStation RS3621xs+ 12-Bay NAS Enclosure

Engineered to deliver high throughput and robust data protection, the RackStation RS3621xs+ 12-Bay NAS Enclosure from Synology is a true enterprise powerhouse. Designed with a 12-bay, 2 RU storage form factor, built-in 500W redundant power supplies, an 8-core processor, ECC memory, advanced snapshot technology, and file self-healing, the RS3621xs+ provides a reliable founding to data-driven businesses. This unit has 12 drive bays, each of which natively supports 3.5" SATA hard drives, as well as 2.5" SATA hard drives and SSDs. Should users need to expand the overall capacity of their RS3621xs+, two optional RX1217/RX1217RP expansion units may be used to connect up to 24 additional drive bays, and each unit is connected using an integrated expansion port. The RS3621xs+ can deliver 4K random reads of up to 238,273 IOPS and sequential reads of up to 5819 MB/s.

The RackStation RS3621xs+ is powered by a 2.1 GHz Intel Xeon D-1541 Eight-Core processor, which will allow you to run multiple functions simultaneously. The built-in 8GB of DDR4 ECC RAM will allow quick access to frequently used files and programs and may also be upgraded to a total of 64GB by installing a 16GB module into each of the four DIMM slots. Also featured are two USB 3.2 Gen 1 Type-A ports, which allow it to be connected to external peripherals. Network connectivity is achieved via the two 10 Gigabit Ethernet or four Gigabit Ethernet ports with failover support, which help to provide redundancy in the case that a LAN connection malfunction occurs on one port. In addition, link aggregation helps to increase connection speeds beyond the limits of a single network port or cable. If you're looking to expand this NAS, there are two PCIe Gen 3.0 x8/x8 slots that support 10GbE network interface cards and M.2 NVMe adapter cards for an SSD cache.

The RackStation RS3621xs+ runs on the DiskStation Manager (DSM) operating system, which helps simplify managing your NAS, as well as accessing and sharing data. A variety of RAID modes are supported, which help provide users with data redundancy, speed, or a combination of both. Supported RAID modes include RAID 0, 1, 5, 6, 10, Basic, and Synology RAID F1. For those who do not require a RAID, JBOD is also available, allowing each drive bay to be individually utilized.

Synology has engineered the RackStation RS3621xs+ to be energy efficient. Not only does it offer four 80 x 80mm fans to help keep the system running cool, the server supports numerous scheduled power on / off cycles and hard-drive hibernation to further minimize power consumption and operation expenses. The RackStation RS3621xs+ operates on 100-240 VAC at 50/60 Hz and includes an accessory pack and two AC power cords. Protection is provided by a limited 5-year hardware warranty.

General Features
Accelerate Your Business Options
The 12-bay RS3621xs+ is capable of delivering random 4K reads of over 238K IOPS and a sequential read throughput of 5819 MB/s, making it 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.
Storage You Can Trust
The RS3621xs+ keeps your data protected while you concentrate on delivering 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 environment.

Double Bandwidth
Upgrade network bandwidth in minutes by 2x or more with Synology's range of 10GbE NICs.

SSD Cache
Boost read/write IOPS by up to 16 times by enabling SSD cache with 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.
Keep Disaster at Bay
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. Deduplication, 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.
Back Up Your Entire IT Infrastructure
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, multi-versioning, 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 cameras 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-bit 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 with Synology Drives
Engineered to handle intensive 24/7 workloads, Synology drives, including the 3.5" HAT5300 HDD, M.2 SNV3000 SSD, and 2.5" SAT5200 SSD 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.

Secure data with comprehensive built-in security tools to protect your devices against evolving threats.

Public Cloud Integration
Back up and synchronize data easily between public cloud accounts and your NAS.
Limited 5-Year Warranty
Synology is committed to product innovation and quality. The RS3621xs+ is backed by a limited 5-year warranty that includes technical support and hardware replacement services to maximize your return on investment.
Synology Replacement Service (SRS)
SRS provides free advance replacement units as early as the next business day in selected regions, maximizing the service uptime for your mission-critical storage and ensuring your business continuity
Optimized for Data Protection and Integrity
Powered by Synology DSM, Synology's 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 Snapshots Technology
Provides schedulable and near-instantaneous data protection of shared folders and LUNs.

File and Folder-Level Data Restoration
Enables restoration of specific files or folders.

Flexible Storage Quota System
Helps admins effortlessly manage available space by specifying storage limits for shared folder.

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.
Virtualization and Certified Storage
DSM streamlines the provisioning and management of storage for virtual machines (VM). Certified for VMware vSphere, Microsoft Hyper-V, Citrix XenServer, and OpenStack, it integrates with your virtualization platform of choice through iSCSI or NFS protocols. Install Synology Storage Console on VMware or Windows platforms for additional management convenience and functionality right in the hypervisor.

Synology Virtual Machine Manager
A hosted supervisor for virtual machines running Windows, Linux, or virtualized versions of DSM with recovery mechanisms that help ensure data protection on each VM.
Data Backup Solutions for IT Infrastructure
Synology Active Backup Suite
A collection of license-free backup solutions built to help protect Windows systems and servers, VMs, other file servers, and cloud-based storage.

Active Backup for Businesses (ABB)
Consolidates backup tasks for physical and virtual environments and enables rapid restoration of files, entire physical machines, and VMs.

Active Backup for G Suite
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.
UPC: 846504004072
Synology 12TB HAT5300 SATA III 3.5" Internal Enterprise HDD

Designed to tackle demanding, high-volume workloads in 24/7 environments, the 12TB HAT5300 SATA III 3.5" Internal Enterprise HDD from Synology has been optimized for their storage solutions and enables a high sequential throughput that helps maximize the number of clients a system can sustain. Engineered for improved dependability, the HAT5300 has a Mean Time to Failure (MTTF) rating of 2.5 million hours and a yearly workload rating of 550TB. Also featured is a storage capacity of 12TB, a SATA III 6 Gb/s interface, a 256MB cache, and a rotational speed of 7200 rpm, all of which help to ensure uninterrupted data transfers with sustained speeds of up to 242 MB/s.

Enterprise Reliability and Durability
For demanding 24/7 environments, rated for 2.5 million hours MTTF, and up to 550TB per year workloads
Persistent Write Cache Technology
Minimizes the chance of data corruption in the event of sudden power loss
Better Together
Firmware and DiskStation Manager (DSM) optimizations improve multi-client sequential read performance by up to 23%
One-Stop Update
Get automatic firmware updates together through DSM updates, reducing the need for additional maintenance sessions
For Synology, by Synology
Stringent validation and up to 300,000 hours of tests helps ensure greater reliability in Synology systems
General Features
Scale Up Confidently
Synology HAT5300 drives are engineered to provide fast and dependable performance, even for a large number of clients. Firmware and software collaborate to deliver enhanced performance, with sequential read speeds that are 23% higher than drives with a similar capacity. The HAT5300 provides outstanding performance for large-scale video surveillance, multimedia post-production, and enterprise file server environments.
Endurance and Reliability
Designed with Synology's expertise in storage systems, HAT5300 series drives are backed by a 2.5 million hour MTTF rating, workload support of 550TB per year, and persistent write cache technology. Over 300,000 hours of compatibility and stress testing ensure that the HAT5300 can continuously operate, even under extreme workloads with Synology's NAS and IP SAN lineup. Combined with data protection solutions running on Synology systems, you can confidently depend on your data 24/7 using HAT5300 series drives.
Simplified Maintenance
DSM updates will ensure that compatible Synology drives will be updated together with the operating system. This reduces the number of maintenance sessions IT teams need to schedule while also increasing the entire system's service availability. Simplify IT infrastructure planning requirements by getting support for the entire system from Synology.
UPC: 846504004133

Synology RackStation RS3621xs+ 12-Bay NAS Enclosure Specs

Key Specs
Number of Bays
12x 2.5"/3.5"
2x USB-A 3.0 / 3.1/3.2 Gen 1
2x RJ45 10GbE
4x RJ45 Gigabit Ethernet
2x Infiniband
Compatible Drive Interface
RAID 0/1/5/6/10/Basic/F1
8-Core: 2.1 to 2.7 GHz
Intel Xeon D-1541
Total Installed Memory
User-Replaceable Memory
1x 8 GB
Total Memory Slots
Maximum Memory Capacity
64 GB
Number of Bays
12x 2.5"/3.5"
2x USB-A 3.0 / 3.1/3.2 Gen 1
2x RJ45 10GbE
4x RJ45 Gigabit Ethernet
2x Infiniband
Compatible Drive Interface
Media Card Slots
Form Factor
Rackmount (2 RU)
RAID 0/1/5/6/10/Basic/F1
Hot-Swap Support
PCI Expansion
2x PCIe 3.0 (x8 Electrical)
Wake on LAN
Link Aggregation and Failover Support
Supported Protocols
iSCSI Target
Max Concurrent Connections
Max Folders
Max Sync Tasks
Max Groups
Max User Accounts
Max Volume Number
Max Cameras Supported
Installed Operating System
Synology OS
Supported File Systems
Internal: BTRFS, EXT4
External: BTRFS, EXT3, EXT4, FAT32, HFS+, NTFS, exFAT
OS Compatibility
Windows 7 or Later
macOS 10.12 or Later
Mobile App Compatible
Supported Browsers
Chrome, Edge, Firefox, Internet Explorer, Safari
Supported Languages
Brazilian Portuguese
Simplified Chinese
Traditional Chinese
VPN Server Connections
AC Input Power
100 to 240 VAC, 50 / 60 Hz
Power Source
Internal Power Supply
Power Consumption
142.5 W (Typical)
72.76 W (Standby)
PSU Wattage
2 x 500 W (Supports Redundancy)
Operating Temperature
32 to 95°F / 0 to 35°C
Operating Humidity
5 to 95%
Storage Temperature
-5 to 140°F / -20 to 60°C
Status Monitoring
LED Indicator
4x 80 mm Fans
Noise Level
50.2 dBA
Built-In Speakers
28.5 x 19 x 3.5" / 724 x 482 x 88 mm
32.0 lb / 14.5 kg
Packaging Info
Package Weight
42.5 lb
Box Dimensions (LxWxH)
33.5 x 24.25 x 8.75"

Synology 12TB HAT5300 SATA III 3.5" Internal Enterprise HDD Specs

Key Specs
Storage Capacity
12 TB SATA III (6 Gb/s) 3.5" HDD (7200 rpm)
Read Speed
Maximum: 242 MB/s
Write Speed
Maximum: 242 MB/s
Read Speed
Maximum: 242 MB/s
Write Speed
Maximum: 242 MB/s
256 MB
HDD Specs
Disk Sector Format
Reliability / Data Integrity
Endurance (Total Bytes Written)
550 TB
Mean Time Between Failures (MTBF)
2.5 Million Hours
Power Draw
7.83 W (Active)
4.25 W (Idle)
Supported Voltage
5 VDC, 12 VDC
Operating Temperature
41 to 140°F / 5 to 60°C
Storage Temperature
104 to 158°F / 40 to 70°C
Operating Shock
70 G / 2.0 ms
Storage Shock
250 G / 2.0 ms
Operating Vibration
0.75 G / 5 to 300 Hz
Storage Vibration
3.0 G / 5 to 500 Hz
Operating Humidity
5 to 90%
Storage Humidity
5 to 95%
Storage Altitude
-1,000 to 40,000' / -304.8 to 12,192 m
5.8 x 4.01 x 1" / 147 x 101.85 x 26.1 mm
25.4 oz / 720 g
Packaging Info
Package Weight
1.8 lb
Box Dimensions (LxWxH)
8.9 x 6.1 x 3"

Synology RS3621xs+ External HDD Reviews

See any errors on this page? Let us know

What is the Write Speed?

What is the Write Speed?
Asked by: justin
The Synology RackStation RS3621xs+ does not have a write speed because this is an empty enclosure. Write speeds would depend on the drives you use with the enclosure.
Answered by: Geoffrey
Date published: 2021-12-16

Where can I find the rack rails for this device?

Where can I find the rack rails for this device?
Asked by: David
You can use the Synology Sliding Rail Kit BH #SYRKS02.
Answered by: dariusb
Date published: 2022-10-06

Is this server compatible with Exos X18 drives? I ...

Is this server compatible with Exos X18 drives? I don't want to buy a platform that requires you to use proprietary and expensive drives
Asked by: michael
No, its only compatible with 1 Seagate EXOS drive and its not the x18.
Answered by: Robert
Date published: 2022-06-14
  • y_2024, m_3, d_1, h_9CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.38
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_3
  • loc_en_US, sid_1658052, prod, sort_[SortEntry(order=HAS_STAFF_ANSWERS, direction=DESCENDING)]
  • clientName_bhphotovideo