Synology
RackStation RS4021xs+ NAS Server with Xeon 2.1GHz CPU, 64GB Memory, 320TB HDD Storage, 2 x 10GbE LAN Ports, Redundant Power, DSM Operating System Bundle with Rail kit
*Price sourced from Amazon.com. Last updated 2026-05-25. Price and availability subject to change.
Form Factor: NAS Rack ServerInternal File System Format: EXT4, BtrfsPorts: 4 x RJ-45 1GbE and 2 x RJ-45 10GbE LAN Ports (both with Link Aggregation/ Failover support); 2 x USB 3.2 Ports; 2 x Expansion Ports; Btrfs File System for Advanced LUN iSCSI ServiceProcessor: Xeon D-1541 8-Core 2.1GHz CPUMemory: 64GB DDR4 ECC UDIMMStorage: 320TB (16 x 20TB) SATA 3.5" HDDs for High-Capacity StoragePower: Redundant Power SupplyOperating System: Synology DSM SoftwareProvides reliable and safe data security and lightning-fast performance. Supports large multi-user environments while handling data…
SpecPicks Verdict
SpecPicks classifies Synology RackStation RS4021xs+ NAS Server with Xeon 2.1GHz CPU, 64GB… as a niche pick — read recent reviews before buying in the nas & home servers category, based on limited Amazon review volume so far and our ranking model that weights rating × review-volume × price-fit. Synology's positioning sits within the broader category mid-tier. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
Common buyer scenarios for nas & home servers of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ Hard drives and memory upgrades included separately not installed, installation required.
- ✓ Backed by Synology's warranty and support channels
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key Features
- Xeon D-1541 8-Core 2.1GHz CPU, Up To 2.7GHz Turbo; 64GB DDR4 ECC UDIMM Memory; 320TB (16 x 20TB) SATA 3.5" HDDs for High-Capacity Storage
- Securing Your Business Assets: The Synology RS4021xs+ is a 16-bay NAS that prioritizes data security and delivers lightning-fast performance, boasting over 234K 4K random read IOPS and 6,258 MB/s sequential read throughput. With an 8-core Xeon processor, ECC memory, advanced snapshot technology, and built-in dual-port 10GbE connectivity, it ensures robust data security and efficient handling of data-intensive workloads in large multi-user environments.
- Engineered for Service Continuity: The RS4021xs+ is designed to ensure mission-critical data availability, even in the face of disasters. With redundant power supplies, hot-swappable fans, and Synology High Availability (SHA) for active-passive clustering with minute-level failover, businesses can maintain uninterrupted operations and maximize service availability.
- Storage for Virtualization: Synology iSCSI storage seamlessly integrates with mainstream virtualization solutions such as vSphere, Hyper-V, XenServer, and Cinder. With features like vSphere 6.5 and VAAI integration, Windows Offloaded Data Transfer (ODX), and Synology Storage Console, the NAS enhances usability and simplifies storage provisioning and management in virtualized environments.
- Hard drives and memory upgrades included separately not installed, installation required.
Full Specifications
| Size | d) 320TB HDD Storage |
|---|---|
| Brand | Synology |
| Color | Black |
| Turbo | Yes |
| Material | Metal |
| Unit Count | 16.0 Count |
| Model Number | RS4021xs+ |
| Mounting Type | Rack Mount |
| Compatible Devices | Server |
| Enclosure Material | Metal |
| Is Assembly Required | Yes |
| Warranty Description | Manufacturer |
Ready to buy?
Synology RackStation RS4021xs+ NAS Server with Xeon 2.1GHz CPU, 64GB Memory, 320TB HDD Storage, 2 x 10GbE LAN Ports, Redundant Power, DSM Operating System Bundle with Rail kit is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-05-25. Price and availability subject to change.
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