Engineered to deliver high throughput and robust data protection to help safeguard mission-critical info, the RackStation RS3621RPxs 12-Bay NAS Enclosure from Synology is a 12-bay, 2 RU storage solution with built-in 500W redundant power supplies, ECC memory, and the Btrfs file system that can handle the demanding workloads of modern business environments. 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 RS3621RPxs, 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 RS3621RPxs can deliver 4K random reads of up to 189,098 IOPS and sequential reads of up to 4718 MB/s.

The RackStation RS3621RPxs is powered by a 2.2 GHz Intel Xeon D-1531 Six-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 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, powered by four LAN ports, 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 RS3621RPxs 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 RS3621RPxs 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 RS3621RPxs 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.

144TB Storage Capacity    12 x 12TB 7200 rpm SATA III 3.5" HDDs    2.2 GHz Intel Xeon D-1531 Six-Core    8GB of DDR4 ECC RAM    4 x RJ45 Gigabit Ethernet Ports    2 x USB 3.2 Gen 1 Type-A Ports    RAID 0, 1, 5, 6, 10, JBOD, & Basic    2 x PCIe 3.0 x8/x8 Slots    Dual Redundant 500W Power Supplies    AES-NI Hardware Encryption Engine

The Synology RS3621RPxs is a powerful 12-bay storage server. Its six-core processor enables compute-intensive services while its redundant power, ECC memory, and Btrfs file system safeguard mission-critical data. Capable of delivering 189,098 4K random read IOPS and 4718 MB/s sequential read throughput, it is ideal for small businesses.

Service continuity is at the core of the RS3621RPxs.

Redundant Power

Dual PSUs provide protection against a PSU failure or accidental cord removal while hot-swappable fans can be replaced without powering down the system.

Near-Zero Downtime

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.

The two built-in PCIe slots allow users to customize the RS3621RPxs to satisfy unique performance, networking, and storage requirements.

10GbE Ready

Support for 10GbE NICs expands the throughput of the unit by up to five times with link aggregation.

SSD Cache

Boost read/write IOPS by up to 16 times by enabling SSD cache via Synology M.2 NVMe adapter cards and SNV3000 Series SSDs, or by installing one or more 2.5" SAT5200 SSDs.

On-Demand Drive Bays

Expand to 36 drive bays using two RX1217(RP) expansion units with minimal intervention.

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.

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.

Synology Surveillance Station transforms the RS3621RPxs into a feature-packed Network Video Recorder solution. Support for up to 75 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

256-bit AES encryption keeps locally-stored footage secure.

Access from Anywhere, Anytime

Access recordings and live streams wherever 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.

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 DSM, Synology's unified data management operating system, and built upon the Btrfs file system, data stored on the RS3621RPxs 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.

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.

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.

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.

Related Questions and Answers

Q: 1. Does the DS1821+ support 18TB drives, specifically the Seagate IronWolf Pro 18TB ?

A: On the compatibility page of the Synology DiskStation DS1821+ 8-Bay NAS Enclosure, Synology recommends hard drives up to 16TB (Mode number: ST16000VE000; Mode number:HAT5300-16T; model number:ST16000NM001G - 2KK103; model number:ST16000NE000 - 2RW103; model number:ST16000VN001 - 2RV103), . ​Please note that the HDD/SSD firmware may be updated or modified by its manufacturer without prior notice. Synology can only ensure that the firmware listed is compatible with Synology products.

Q: 2. How noisy are these units compared to the desktop versions?

A: This product has a noise level of 39.3 dBA.

Q: 3. Can this support 20 TB hard drives?

A: Yes, the Synology RackStation RS422+ 4-Bay NAS Enclosure is compatible with 20 TB drives.

Q: 4. Can this device (and its corresponding software) allow copying full folder trees, or is it limited to single folders (or files)?

A: Yes, the DiskStation DS124 1-Bay NAS Enclosure can copy full folders.

Q: 5. For the new NVME storage pool feature, are 3rd party NVMEs supported?

A: Yes, you can use 3rd-party M.2 2280 NVMe SSDs in the Synology DiskStation DS1821+ 8-Bay NAS Enclosure.

Q: 6. Hello, I would like to know if this Synology model is compatible with the MailPlus service?

A: No, the Synology DiskStation DS423 4-Bay NAS Enclosure is not compatible with the MailPlus service. In order to use MailPlus, you need the Synology DiskStation DS423+ 4-Bay NAS Enclosure, B&H # SYDS423P.

Q: 7. Does the DS1821 support 16TB drives, specifically WD Red Pro 16Tb?

A: While the WD Red Pro is not listed as a drive that was tested with the Synology DiskStation DS1821+ 8-Bay NAS Enclosure, it will still work with the unit.

Q: 8. Does this use hardware or software RAID?

A: The Synology RackStation RS1221RP+ 8-Bay NAS Enclosure uses software RAID.

Q: 9. Hello, is this a reliable and fast solution for 2 to 4 clients sharing 4k prores video files ? all on fcpx thx

A: No, it is not recommended to edit from. You need a NAS with Thunderbolt 3.Here is an example: https://www.bhphotovideo.com/c/product/1446234-REG/qnap_tvs_472xt_pt_4g_us_tvs_472xt_ultra_high_speed_4_bay.html

Q: 10. What is the max memory that can be installed on this max?

A: The RAM cannot be upgraded on this Synology RackStation RS422+ 4-Bay NAS. https://www.bhphotovideo.com/lit_files/844196.pdf