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.
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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.
Intel® Xeon® D-1541 8-core 2.1 GHz
Built-in dual-port 10GbE
16 GB ECC DDR4 Up to 64 GB
Up to 40 drive bays with RX1217(RP)
The RS4021xs+ ensures mission-critical data is always available, enabling businesses to deliver the best results, even in the face of disaster.
Dual PSUs provide protection against a PSU failure or accidental cord removal while hot-swappable fans can be replaced without powering down the system.
Synology High Availability (SHA) pairs two identical units together creating an active-passive cluster with minute-level failover.
Btrfs prevents data corruption and reduces maintenance overheads with advanced storage technologies and optimized snapshots.
The RS4021xs+ includes two PCIe slots for performance, networking, and storage upgrades enabling it to adapt to any business environment2.
Upgrade network bandwidth in minutes by 2x or more with Synology’s range of 10GbE NICs.
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 RX1217(RP) expansion units.
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.
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.
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.
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.
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.
AES-256 encryption keeps locally-stored footage secure.
Access recordings and live streams whenever you want using a web browser, desktop client, or the DS cam mobile app.
Email, SMS, or push notifications alert you when incidents occur or predefined conditions are met.
Engineered to handle intensive 24/7 workloads, Synology drives consistently deliver top-grade performance.
The RS4021xs+ runs Synology DiskStation Manager (DSM), the web-based operating system equipped with powerful applications and services for business.
Conveniently manage your fleet of Synology NAS from a centralized console.
Instantly access your NAS files across multiple devices whenever you want, wherever you are.
Satisfy all team collaboration needs behind the safety of your own private cloud with Synology Office, Calendar, and Chat.
Run various operating systems in isolated sandboxes. Seamlessly clone, store, and migrate virtual machines.
Shield your Synology NAS from the most sophisticated threats with industry-leading security solutions.
Back up and synchronize data easily between public cloud accounts and your NAS.
Specifications
Hardware Specs
CPU
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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 |
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Storage
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Drive Bays | 16 |
Maximum Drive Bays with Expansion Unit | 40 (RX1217/RX1217RP x 2) | |
Compatible Drive Type* (See all supported drives) |
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Hot Swappable Drive* | ✓ | |
Notes |
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External Ports
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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
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PCIe Expansion | 2 x Gen3 x8 slots (x8 link) |
File System
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Internal Drives |
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External Drives |
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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
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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
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System Fan | 80 mm x 80 mm x 3 pcs |
Fan Speed Mode |
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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) |
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British Thermal Unit | 497.14 BTU/hr (Access) 213.74 BTU/hr (HDD Hibernation) |
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Notes |
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Temperature
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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
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Warranty
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5 Years | |
Notes | The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) | |
Environment
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RoHS Compliant | |
Packaging Content
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Optional Accessories
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Notes | All memory modules will operate at the maximum frequency specified by the CPU manufacturer. |
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Before your contact us for return and warranty of your purchase, please be aware the following terms and conditions.
*All return enquiry should send to RA@pclan.com.au to avoid delay.
Page Index
We encourage customers to carefully consider their purchases before placing an order. However, if a non-faulty item needs to be returned due to a change of mind or incorrect purchase, please refer to our policy below:
All brand new products (with the exception of consumable products and software) sold by PC Lan Pty Ltd are covered by Australian manufacturer warranty. For used or ex-demo product, warranty terms will be stated in the listing, or otherwise, customer can contact us for warranty information.
If your item is confirmed to be defective when delivered, it will be treated as Dead On Arrival (DOA). The DOA period is 14 days from your invoice date. DOA claims are eligible for a refund or replacement after the faulty item has been returned to us.
Please note:
If a product is outside the 14-day DOA period, the standard manufacturer warranty terms will apply. As some of our products, like electronics and computers, require specialized support, we strongly recommend that you first contact the manufacturer for troubleshooting assistance. Their support team is more knowledgeable in diagnosing and resolving issues and can help minimize delays that may arise from us acting as an intermediary. However, if the manufacturer is unable to assist, our team can step in and provide further assistance. Our product's Manufacturer Contact.
Please note:
Once we receive a faulty product, we will send it to the manufacturer or their authorized service center for assessment. However the return will be rejected in below cases:
After we receive the repaired or replacement unit from manufacturer, we will arrange return delivery to you.
Note: If the fault is not covered by the manufacturer's warranty or extended warranty (if applicable), we will provide you with a quote for the repair cost and any costs associated with the processing of the return prior to returning the product(s) to you.
Company |
Phone/Email |
Acer Service Centre |
1300 362 328 (Laptop, LCD) |
APC |
13 73 28 (Tech Support) |
ASUS |
1300 278 788 |
Belkin |
1800 235 546 (English only 24/7) |
Cisco |
1800 805 227 |
CyberPower |
1300 431 808 |
D-Link |
1300 766 868 |
Dahua |
1800 327 457 |
Eaton |
1300 877 877 |
Epson Service Centre |
1300 361 054 |
Fujitsu Service Centre |
1800 288 283 |
Fujixerox |
1800 883 668 |
LaCie |
*Please contact LaCie (Seagate) for Warranty |
Lenovo |
131 426 |
Lexmark (Return to PC Lan) |
(07) 3377 5888 |
LG Service Centre |
1800 643 156 |
Linksys |
1800 605 971 |
Logitech |
1800 025 544 |
HP Service Centre |
131 047; 1300 721 147 (Printer); 131 047 (scanner) |
IBM Service Centre |
1800 289 426 |
Kingston |
1800 620 569 |
Motorola |
1300 138 823 |
Zebra |
1800 457 439 / TSAPAC@zebra.com (Printers) |
Philips |
1300 651 993 |
Qnap |
Contact QNAP Support |
Samsung Service Centre |
1300 362 603 |
Seagate |
|
Sony |
1300 137 669 |
Synology |
Contact Synology Support |
Toshiba |
(02) 9887 6000; 13 30 70 |
Viewsonic Centre Centre |
1800 880 818 |
Wacom |
(02) 9422 6700 |
Western Digital |