United States
Name:
RS4021XS+
- Description:
- SYNOLOGY 16BAY RACKSTATION RS4021XS+ DISKLESS
- Rating:
-
(0)
Added to cart 36 times recently
- Availability:
-
In stock - Ready to Ship
- Brand:
- Synology
- Condition:
- Warranty:
-
3 - List Price:
-
- Price:
-
3 Year Extended Warranty
Same-day Shipping
14-Day Money Back Guarantee
Need Additional Discount on Product?
Request a quote below - Get Exclusive Pricing and Support.
Exclusive Bulk Discounts tailored to your order size
Priority Processing with a dedicated account manager
Fast Response: Get your custom quote within 5-10 minutes during business hours (Mon-Fri, 6:00 AM – 6:00 PM PST)
Holiday Bonus: Submissions on holidays receive priority handling the next business day
Shipping:
Payment:
Shipping as per your need
Same-day Shipping
Express Delivery Across the USA
Need it fast? Choose Express Shipping and receive your order within 1–3 business days.
Free Ground Shipping Available
Standard ground delivery across the U.S. takes 2–6 days, depending on your location — no extra charge.
International Shipments Made Simple
For all international orders, we ship via your UPS, FedEx, or DHL account — or to your U.S.-based freight forwarder.
Delivery Timelines
Under 100 KG? Ships Express.
Smaller shipments go via DHL or FedEx Express — delivered worldwide in approximately 3 business days.
Over 100 KG? Ships via Freight.
Larger orders are dispatched through freight forwarding partners. Delivery takes 7–10 business days, globally.
Always Delivered to Your Door
Every shipment is delivered directly to your address — regardless of country or carrier.
Our best-in-class warranties
3-Year Extended Warranty
Extended protection, enterprise-grade.
All enterprise hardware is backed by a 3-year warranty — triple the industry standard — covering defects under normal use.
Professional repairs & replacements.
If a hardware issue is confirmed, we’ll repair or replace the unit. Replacement parts carry either original or 3-month coverage.
RMA process, simplified.
Once an RMA is approved, return the defective unit within 10 days. We handle the rest — no service gaps.
Service Boundaries & Exclusions
What’s covered — and what’s best avoided.
Your warranty covers defects under normal use. For continued protection, avoid accidental damage, unauthorized repairs, third-party parts, or extreme environments.
Know your location’s service type.
In some regions, return-to-factory or remote service may apply. On-site service depends on infrastructure availability.
Minimal documentation required.
To initiate service, just submit the invoice and warranty card — no red tape, no waiting.
14-Day Money Back Guarantee
Free 14-Day Returns
Tested it, but it’s not a fit?
Return any product within 14 days of delivery if it doesn’t meet your technical or operational needs.
Initiate returns with ease.
Our RMA process is streamlined — just raise a request, follow the packaging guidelines, and we’ll handle the rest.
Refund or restock, your call.
Changed your mind? Get a refund (restocking fees may apply) or swap with another product.
30-Day Hardware Replacement
Covered for any early faults.
All equipment includes a 30-day replacement warranty. If something goes wrong, we’ll repair or swap it — fast.
Replacements shipped in 10 days or less.
Once your return is inspected and approved, we dispatch the replacement promptly to keep your operations moving.
RMA protocol keeps it smooth.
Just ensure all accessories and original packaging are intact — we’ll take care of the technical validation.
TRUSTED, TRIED, PROVEN
RS4021XS+ Overview
RS4021XS+ is a high-performance SAN storage system engineered for enterprise data centers and SMB backup environments. It features a 24‐bay configuration that supports a mixed array of drive types including SATA HDDs, SAS HDDs, SATA SSDs, and NVMe SSDs, offering a total storage capacity of up to 512 TB. The system supports multiple RAID configurations such as RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10, ensuring reliable data protection and performance under heavy workloads.
RS4021XS+ is powered by an Intel Xeon processor with 8 CPU cores and comes with 16 GB of pre-installed DDR4 memory, expandable to a maximum of 128 GB. It provides versatile connectivity through USB 3.2 ports, 10GbE network ports, and Fibre Channel support, while offering expansion capabilities for future upgrades. The system is equipped with redundant power supplies rated at 500W and redundant fan cooling, making it ideal for use cases such as SMB backup, enterprise data centers, virtualization, and media server deployments.
What is the price of RS4021XS+?
Pricing for RS4021XS+ is available on request. Get immediate quote or for exclusive discounts, opt for bulk quotation for RS4021XS+.
Explore more options from Storage or explore other Synology products.
RS4021XS+ Specifications
| Product Type | Storage System |
| Storage Type | SAN |
| Form Factor | Rackmount |
| Bay Count | 24-bay |
| Supported Drive Types | Mixed |
| Hot-Swap Support | Yes |
| Max Supported Capacity | 512 TB |
| RAID Support | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 |
| CPU Type | Intel Xeon |
| CPU Cores | 8 |
| Installed RAM | 16 GB |
| Max RAM Capacity | 128 GB |
| RAM Type | DDR4 |
| Network Ports | 10GbE |
| LAN Ports | 4 |
| USB Ports | USB 3.2 |
| Expansion Support | Yes |
| Cooling | Redundant Fan |
| Power Supply | Redundant |
| Power Supply Wattage | 500W |
| Operating System | QTS |
| Snapshot Support | Yes |
| Cloud Sync Support | Yes |
| Virtualization Ready | Yes |
| ISCSI Support | Yes |
| Surveillance Support | Yes |
| Use Case | Enterprise Data Center |
| Product Name | RS4021XS+ |
| Height | 3.5 inches |
| Width | 19 inches |
| Depth | 30 inches |
| Weight | 75 lbs |
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
|
|
|
|
|
|
|---|---|---|---|---|---|
| Bay Count | 2-bay | 4-bay | 12-bay | 24-bay | 4-bay |
| Cloud Sync Support | Yes | Yes | Yes | Yes | Yes |
| Cooling | Active | Active | Redundant Fan | Redundant Fan | Active |
| CPU Cores | 4 | 4 | 4 | 8 | 8 |
| CPU Type | Realtek | Realtek | Intel Xeon | Intel Xeon | Intel Xeon |
| Depth | 9.13 inches | 8.8 inches | 25 inches | 30 inches | 25.0 inches |
| Expansion Support | No | No | Yes | Yes | Yes |
| Form Factor | Desktop | Desktop | Rackmount | Rackmount | Rackmount |
| Height | 6.5 inches | 9.1 inches | 3.5 inches | 3.5 inches | 3.5 inches |
| Hot-Swap Support | No | Yes | Yes | Yes | Yes |
| Installed RAM | 512 MB | 2 GB | 8 GB | 16 GB | 16 GB |
| iSCSI Support | Yes | Yes | Yes | Yes | Yes |
| LAN Ports | 1 | 2 | 2 | 4 | 2 |
| Max RAM Capacity | 512 MB | 2 GB | 32 GB | 128 GB | 64 GB |
| Max Supported Capacity | 32 TB | 64 TB | 512 TB | 512 TB | 256 TB |
| Network Ports | 1GbE | 1GbE | 10GbE | 10GbE | 10GbE |
| Operating System | DSM | DSM | QTS | QTS | Custom OS |
| Power Supply | Single | Single | Redundant | Redundant | Redundant |
| Power Supply Wattage | N/A | N/A | 350W | 500W | 500W |
| Product Name | Synology DiskStation DS220j | Synology DiskStation DS418 | RS822RP+ | RS4021XS+ | FS3400 High-Performance NAS Storage System |
| Product Type | Storage System | Storage System | Storage System | Storage System | Storage System |
| RAID Support | RAID 0 / RAID 1 / JBOD | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 / JBOD | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 |
| RAM Type | DDR4 | DDR4 | DDR4 | DDR4 | DDR4 |
| Snapshot Support | Yes | Yes | Yes | Yes | Yes |
| Storage Type | NAS | NAS | NAS | SAN | NAS |
| Supported Drive Types | SATA HDD / SATA SSD | SATA HDD / SATA SSD | Mixed | Mixed | SATA HDD / SAS HDD / SATA SSD / NVMe SSD |
| Surveillance Support | Yes | Yes | No | Yes | No |
| USB Ports | USB 3.0 | USB 3.0 | USB 3.2 | USB 3.2 | USB 3.1 |
| Use Case | Home Backup | SMB / Media Server / Virtualization | Enterprise Data Center | Enterprise Data Center | SMB / Enterprise Data Center / Media Server / Virtualization |
| Virtualization Ready | No | Yes | Yes | Yes | Yes |
| Weight | 2.5 lbs | 4.5 lbs | 40 lbs | 75 lbs | 30 lbs |
| Width | 4.25 inches | 6.5 inches | 17.5 inches | 19 inches | 17.5 inches |
Showing - of 0 Results
Questions & Answers
Q
What is the Synology RS4021xs+ 16-bay RackStation?
A
The Synology RS4021xs+ is a high-performance 1U rackmount NAS with 16 drive bays, designed for SMBs and enterprises requiring scalable storage, advanced data management, and seamless virtualization support.
Q
Which CPU and memory configuration does the RS4021xs+ use?
A
The RS4021xs+ features an Intel Xeon D-1541 8-core 2.1 GHz processor (boost to 2.7 GHz) and comes with 8 GB DDR4 ECC RAM, expandable up to 64 GB for demanding workloads.
Q
What is the maximum raw capacity of the RS4021xs+?
A
With 16 bays supporting up to 18 TB drives, the RS4021xs+ delivers a maximum raw capacity of 288 TB, expandable to 576 TB with one RX1217/RX1217RP expansion unit.
Q
Which drive types are supported by the RS4021xs+?
A
The RS4021xs+ supports 3.5″ and 2.5″ SATA SSDs and HDDs, including hot-swappable drives for uninterrupted operation and flexible tiered storage configurations.
Q
Is the RS4021xs+ sold with drives installed?
A
No, the RS4021xs+ is diskless—buyers must install their own compatible 3.5″ or 2.5″ SATA drives to customize capacity and performance.
Q
Which RAID levels does the RS4021xs+ support?
A
Synology RS4021xs+ supports RAID 0, 1, 5, 6, 10, 50, and 60, as well as Synology Hybrid RAID (SHR), enabling optimal balance between performance, capacity, and data protection.
Q
Can I expand storage beyond the initial 16 bays?
A
Yes, you can connect up to one RX1217 or RX1217RP expansion unit to increase capacity by an additional 12 bays, for a total of 28 drives.
Q
What network connectivity options are included?
A
The RS4021xs+ includes four 1 GbE RJ-45 ports, two 10 GbE SFP+ ports, and optional PCIe slots for adding 25 GbE or 40 GbE network cards to meet high-throughput demands.
Q
What performance can I expect from the RS4021xs+?
A
Equipped with SSD caching and 10 GbE connectivity, the RS4021xs+ delivers over 4,200 MB/s sequential read and 870,000 IOPS, ideal for virtualization and database applications.
Q
Is the RS4021xs+ compatible with virtualization platforms?
A
Yes, it is certified for VMware vSphere, Microsoft Hyper-V, Citrix XenServer, and OpenStack Cinder, supporting advanced features like VAAI, thin provisioning, and multipath I/O.
Q
How does Synology RS4021xs+ handle backup and disaster recovery?
A
Synology RS4021xs+ offers Snapshot Replication, Hyper Backup, and Active Backup Suite, providing block-level snapshots, multi-versioning, and offsite replication for comprehensive data protection.
Q
What operating system runs on the RS4021xs+?
A
It runs DiskStation Manager (DSM) 7, a Linux-based NAS operating system featuring a modern web UI, integrated container, and hybrid cloud services.
Q
What security features are built into the RS4021xs+?
A
The RS4021xs+ includes AES-NI hardware encryption, secure boot, TPM 2.0 compatibility, and advanced firewall, malware prevention, and two-factor authentication for enterprise-grade security.
Q
What is the typical power consumption of the RS4021xs+?
A
At full load, the RS4021xs+ consumes approximately 180 W (without drives) and 40 W in hibernation mode, featuring dual 550 W redundant power supplies for high availability.
Q
What are the physical dimensions and weight of the RS4021xs+?
A
The RS4021xs+ measures 44 mm × 430.5 mm × 566 mm (HxWxD) and weighs 13.8 kg (diskless), fitting standard 1U rack spaces in 19″ server racks.
Q
What warranty and support options are available?
A
Synology offers a 5-year limited warranty on the RS4021xs+, with optional Synology Replacement Service (SRS) for next-business-day advance hardware replacement.
