Synology RS4021xs+

Synology
RS4021xs+

XS+/XS Series RackStation RS4021xs+

Enterprise NAS with built-in service continuity engineered for data-intensive applications

CPU: Intel Xeon D-1541 8-core 2.1 (base) / 2.7 (turbo) GHz

RAM: 16 GB DDR4 ECC UDIMM (Max 64GB)

RJ-45 10GbE LAN Port x2

RJ-45 Gigabit LAN Port x4

USB 3.2 Gen 1 Port x2

Expansion Port x2

PCIe Gen3 x8 slot x2

Redundant Power Supply

5 Years Warranty

----- Reference -----

Synology RS4021xs+, 16 Bays NAS, Enterprise NAS with built-in service continuity engineered for data-intensive applications, CPU: Intel Xeon D-1541 8-core 2.1 (base) / 2.7 (turbo) GHz, RAM: 16 GB DDR4 ECC UDIMM (Max 64GB), RJ-45 10GbE LAN Port x2, RJ-45 Gigabit LAN Port x4, USB 3.2 Gen 1 Port x2, Expansion Port x2, PCIe Gen3 x8 slot x2, Redundant Power Supply, 5 Years Warranty

Drive Bays : 16-Bays NAS
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Synology RackStation RS4021xs+

Enterprise NAS with built-in service continuity engineered for data-intensive applications

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Securing your business assets

The 16-bay RS4021xs+ provides solid data security and lightening-fast performance with over 234K 4K random read IOPS and 6,258 MB/s sequential read throughput1. Together with its 8-core processor, ECC memory, advanced snapshot technology, and built-in 10GbE connectivity, the RS4021xs+ can support large multi-user environments while handling data-intensive workloads.

Download Datasheet

Compute

Compute

Intel® Xeon® D-1541 8-core 2.1 GHz

Networking

Networking

Built-in dual-port 10GbE

Memory

Memory

16 GB ECC DDR4 Up to 64 GB

Scalability

Scalability

Up to 40 drive bays with RX1217RP/RX1217


Engineered for service continuity

The RS4021xs+ ensures mission-critical data is always available, enabling businesses to deliver the best results, even in the face of disaster.

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.

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.

Engineered for service continuity

Customize to your business

The RS4021xs+ includes two PCIe slots for performance, networking, and storage upgrades enabling it to adapt to any business environment2.

Double bandwidth

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


SSD cache

Boost read/write IOPS by up to 16 times by enabling SSD cache with our Synology M.2 NVMe adapter cards and SNV3500 SSDs, or by installing one or more 2.5” SAT5200 SSDs.
SSD cache<sup>3</sup>

Boost read/write IOPS by up to 16 times by enabling SSD cache with our Synology M.2 NVMe adapter cards and SNV3500 SSDs, or by installing one or more 2.5” SAT5200 SSDs.

Quickly and easily scale up to 40 drives with two RX1217RP/RX1217 expansion units.
Storage expansion
vmware   windows2022   citrix   openstack


Works best with Synology drives

Engineered to handle intensive 24/7 workloads, Synology drives consistently deliver top-grade performance.

Enterprise Series 3.5" SATA

Enterprise Series 2.5" SATA

Enterprise Series M.2 NVMe


5-year warranty

At Synology, we are committed to product innovation and quality. The RS4021xs+ is backed by a 5-year limited warranty that includes technical support and hardware replacement services to maximize your return on investment. 

5-year warranty


RackStation
RS4021xs+

product RS4021xsplus front view photo
product RS4021xsplus back view photo
  • 1Power button and indicator
  • 2Alert Off Button
  • 3Drive tray
  • 4Drive status indicator
  • 5PSU fan
  • 6Power Port
  • 7PSU Indicators & Alert Off Buttons
  • 8Console port
  • 91GbE/10GbE RJ-45 Ports
  • 10USB 3.2 Ports
  • 11Expansion port
  • 12PCIe expansion slot
  • 13Reset button

Hardware Specifications

CPU
CPU Model Intel Xeon D-1541
CPU Quantity 1
CPU Architecture 64-bit
CPU Frequency 8-core 2.1 (base) / 2.7 (turbo) GHz
Hardware Encryption Engine
Memory
System Memory 16 GB DDR4 ECC UDIMM
Memory Module Pre-installed 16 GB (16 GB x 1)
Total Memory Slots 4
Maximum Memory Capacity 64 GB (16 GB x 4)
Storage
Drive Bays 16
Maximum Drive Bays with Expansion Unit 40 (RX1217/RX1217RP x 2)
Compatible Drive Type*
  • 3.5" SATA HDD
  • 2.5" SATA SSD
Hot Swappable Drive*
External Ports
RJ-45 1GbE LAN Port 4 (with Link Aggregation / Failover support)
RJ-45 10GbE LAN Port 2 (with Link Aggregation / Failover support)
USB 3.2 Gen 1 Port* 2
Expansion Port 2
Notes The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.
PCIe
PCIe Expansion 2 x Gen3 x8 slots (x8 link)
Appearance
Form Factor (RU) 3U
Size (Height x Width x Depth) 132.3 mm x 482 mm x 656.5 mm
Weight 17.4 kg
Rack Installation Support* 4-post 19" rack (Synology Rail Kit - RKS-02)
Notes The rail kit is sold separately
Others
System Fan 80 mm x 80 mm x 3 pcs
Fan Speed Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
Easy Replacement System Fan
Power Recovery
Noise Level* 44.7 dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter 800 W*
550 W
Redundant Power Supply
AC Input Power Voltage 100 V to 240 V AC
Power Frequency 50/60 Hz, Single Phase
Power Consumption 145.79 W (Access)
62.68 W (HDD Hibernation)
British Thermal Unit 497.14 BTU/hr (Access)
213.74 BTU/hr (HDD Hibernation)
Temperature
Operating Temperature 0°C to 35°C (32°F to 95°F)
Storage Temperature -20°C to 60°C (-5°F to 140°F)
Relative Humidity 5% to 95% RH
Certification
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • EAC
  • CCC
  • KC
  • UL
Warranty
5 Years
Notes The warranty period starts from the purchase date as stated on your purchase receipt.
Environment
RoHS Compliant
Packaging Content
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
Optional Accessories
  • DDR4 ECC UDIMM: D4EC-2666-16G
  • Expansion Units: RX1217/RX1217RP
  • Enterprise Series 3.5" SATA HDD: HAT5300 Series
  • Enterprise Series 2.5" SATA SSD: SAT5200 Series
  • M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1
  • M.2 SSD Adapter Card: M2D20
  • 25GbE Network Interface Card: E25G30-F2
  • 10GbE Network Interface Card: E10G21-F2/E10G30-T2/E10G18-T1
  • Rail Kit Sliding: RKS-02
: RS4021xs+
: 2 Items
Hurry! only 2 items left in stock.