Synology RS3621RPXS

Overview

The Synology RS3621RPXS is a rack-mountable 12-bay NAS enclosure designed to provide reliable, high-speed shared storage for businesses and organizations. Powered by a six-core Intel Xeon D-1531 processor running at 2.2 GHz and equipped with 8 GB of error-correcting DDR4 memory, it handles demanding workloads such as large media file editing, virtual machine hosting, and database management with ease. The system delivers sequential read speeds up to 4718 MB/s and nearly 189,000 IOPS, ensuring fast file transfers and responsive performance even under heavy multi-user access.

Key features

• 12 drive bays compatible with both 3.5-inch and 2.5-inch SATA drives, offering flexible storage options.
• Redundant 500 W hot-swappable power supplies maintain continuous operation in case of power unit failure.
• Four Gigabit Ethernet ports support link aggregation and network failover to maximize throughput and reliability.
• Two PCIe Gen 3.0 slots allow for expansion with 10 GbE network cards or NVMe cache adapters to boost network speed and storage responsiveness.
• Supports multiple RAID configurations (0, 1, 5, 6, 10, Basic, JBOD) to balance performance and data protection according to your needs.
• Btrfs file system enhances data integrity with snapshot capabilities and self-healing features that prevent silent data corruption.
• Expandable chassis design supports up to 36 bays with two additional Synology expansion units, allowing your storage to grow with your business.
• Runs on Synology’s DiskStation Manager OS, providing an intuitive web-based interface for centralized management of backups, file sharing, and virtualization environments.

Key specs

• Processor: Intel Xeon D-1531 six-core 2.2 GHz
• Memory: 8 GB ECC DDR4, expandable up to 64 GB
• Drive bays: 12 (3.5-inch or 2.5-inch SATA)
• Sequential read speed: up to 4718 MB/s
• IOPS: up to 189,098
• Power supplies: dual 500 W redundant, hot-swappable
• Network ports: 4 x Gigabit Ethernet
• Expansion slots: 2 x PCIe Gen 3.0
• RAID support: 0, 1, 5, 6, 10, Basic, JBOD
• File system: Btrfs with snapshot and self-healing

Connectivity and compatibility

The RS3621RPXS offers versatile connectivity options to fit into various network environments. Its four Gigabit Ethernet ports can be combined for higher bandwidth or set up for failover to ensure uninterrupted access. The two PCIe Gen 3.0 slots provide room for upgrading to 10 GbE network cards, which is ideal for high-speed data transfers in demanding office or studio settings. This NAS supports centralized backup and file sharing for Windows and Linux servers, virtual machines, as well as cloud services like Microsoft 365 and Google Workspace, making it a flexible choice for mixed IT environments.

Performance and reliability

Designed for continuous operation, the RS3621RPXS includes redundant power supplies that can be swapped without downtime, ensuring business continuity. The Intel Xeon processor and ECC memory work together to maintain data accuracy and system stability during intensive tasks. The Btrfs file system adds an extra layer of protection by enabling snapshots and automatic data repair, which helps prevent data loss and corruption. These features make the unit well suited for professional teams handling critical data and large workloads.

Ideal uses and environments

This NAS enclosure fits well in environments where fast, reliable shared storage is essential. It is a strong choice for design studios managing large media files, IT departments running virtual machines, and businesses requiring centralized backup solutions. Its scalability and robust data protection features also make it suitable for growing companies that need storage solutions capable of expanding without replacing the entire system. The RS3621RPXS balances performance, capacity, and ease of management to support a wide range of professional applications.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, and include all tags, manuals, accessories, and original, unaltered packaging. To start a return, please email us for approval. Items sent back without approval may be refused or returned to the sender. If any item is kept, its value will be deducted from the refund.

Non-returnable items include opened TVs, combos, or monitors 37″ or larger, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method. Please allow 5–7 business days for the credit to post. Shipping and handling are nonrefundable. If an item is used, incomplete, or not in its original condition, a 30% restocking fee may apply. Direct exchanges are not offered. To exchange an item, please purchase the replacement separately and return the original for a refund.

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We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

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