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Synology RackStation RS4021xs+ 16-Bay NAS Enclosure – Intel Xeon D-1541 8-Core 2.1GHz, 16x 3.5″/2.5″ SATA Drive Bays, 16GB DDR4 RAM, 2x 10GbE RJ45 | 4x GbE RJ45, 2x PCIe 3.0 x8, Black | RS4021XS

Synology RackStation RS4021xs+ 16-Bay NAS Enclosure – Intel Xeon D-1541 8-Core 2.1GHz, 16x 3.5″/2.5″ SATA Drive Bays, 16GB DDR4 RAM, 2x 10GbE RJ45 | 4x GbE RJ45, 2x PCIe 3.0 x8, Black | RS4021XS


AED 23,373.12

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1 year Warranty

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24 Hours Express Delivery

RackStation® RS4021xs+

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

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.

 

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 RX1217(RP)

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

Customized 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 speeds by double or more with Synology’s range of 10Gbe NICs.

SSD cache3

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.

Storage expansion

Quickly and easily scale up to 40 drives with two RX1217(RP) expansion units.

Double bandwidth

The ultimate backup solutions — license-free

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. Deduplication4, 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.

Keep disaster at bay

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. Deduplication4, 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.

Keep disaster at bay

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, multiversioning, and optimizations to reduce bandwidth and storage used.

Backup your entire IT infrastructure

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.

vmware windows2016 citrix openstack

All-in-one surveillance solution

Synology Surveillance Station transforms the RS4021xs+ into a feature-packed Network Video Recorder solution. Support for up to 90 IP cameras5 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

AES-256 encryption keeps locally-stored footage secure.

Access from anywhere, anytime

Access recordings and live streams whenever 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.

All-in-one surveillance solution

Powered by Synology DiskStation Manager

The RS4021xs+ runs Synology DiskStation Manager (DSM), the web-based operating system equipped with powerful applications and services for business.

Central Management System

Central Management System

Conveniently manage your fleet of Synology NAS from a centralized console.

 

Synology Drive

Synology Drive

Instantly access your NAS files across multiple devices whenever you want, wherever you are.

 

Collaboration Suite

Collaboration Suite

Satisfy all team collaboration needs behind the safety of your own private cloud with Synology Office, Calendar, and Chat.

 

Virtual Machine Manager

Virtual Machine Manager

Run various operating systems in isolated sandboxes. Seamlessly clone, store, and migrate virtual machines.

 

Security

Security

Secure data with comprehensive built-in security tools to protect your devices against evolving threats.

 

Public Cloud Integration

Public Cloud Integration

Back up and synchronize data easily between public cloud accounts and your NAS.

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
Weight 17 kg
Drive Bays Support

16 Bay

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 (AES-NI)
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)
Notes Synology reserves the right to replace memory modules with the same or higher frequency based on supplier’s product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance.
Please select Synology memory modules for optimum compatibility and reliability. Synology will not provide complete product warranty or technical support if non-Synology memory modules are used for memory expansion.
For more information about the recommended memory configurations, please check the Hardware Installation Guide of your Synology product.
Storage Drive Bays 16
Maximum Drive Bays with Expansion Unit 40 (RX1217/RX1217RP x 2)
Compatible Drive Type* (See all supported drives) 3.5″ SATA HDD
2.5″ SATA SSD
Hot Swappable Drive*
Notes It is strongly recommended that you only install drives listed on your device’s compatibility list. Storage pool and volume creation processes may fail when using unverified drives. Synology is unable to provide technical support for devices using unsupported components.
“Compatible drive type” indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay.
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)
File System Internal Drives Btrfs
EXT4
External Drives Btrfs
EXT4
EXT3
FAT
NTFS
HFS+
exFAT
Notes exFAT Access can be installed for free from Package Center in DSM 7.0. In DSM 6.2 or earlier versions, exFAT Access needs to be purchased in Package Center.
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)
Notes To learn which PSU module is adopted on your system, please refer to the Product Change Notification and check the 3-digit serial number accordingly.
Power consumption is measured when it is fully loaded with Synology 8TB HAT5300-8T hard drive(s).
Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75?C; Humidity: 58.2-61.8%
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
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
3.5″ SATA HDD: HAT5300
2.5″ SATA SSD: SAT5210
M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1
M.2 SSD Adapter Card: M2D20
25GbE Network Interface Card: E25G21-F2
10GbE Network Interface Card: E10G21-F2/E10G18-T2/E10G18-T1
Rail Kit Sliding: RKS-02
Surveillance Device License Pack

 

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