Synology RackStation RS4021XS+ NAS/storage server Rack (3U) LAN D-1541

£4,281.69 Ex. VAT

In stock

Product SKU:

RS4021XS+

Our pricing options

Deal registration pricing is available on many qualifying projects, offering enhanced discounts through our vendor partnerships. 

Estimated deal registration pricing shown online should be treated as a guide only. Discounts can reach up to 15% when a project meets the manufacturer’s criteria.

Our team will assess eligibility, handle the registration process, and provide the most advantageous options for your project.

We have decades of experience in securing the most competitive pricing for our customers. If you’re planning a new deployment, refresh, or multi-site upgrade, submit an enquiry with your requirements today. 

Our new retail pricing reflects the standard commercial rates set by the manufacturer for brand-new, factory-sealed products. These are typically purchased directly from distribution and come with the manufacturer’s warranty.

Our new retail pricing reflects standard commercial rates for brand-new, factory-sealed products typically supplied through distribution and backed by full warranty.

Our team closely monitors vendor pricing to ensure customers receive competitive rates across all new product ranges. While generally consistent, this can shift with supply conditions or manufacturer updates. All pricing displayed on our site reflects the latest vendor guidance and current market availability.

If you’re planning a deployment, upgrade, or expansion, submit an enquiry. We’ll review your requirements, confirm current pricing, and highlight the most cost-effective options available.

Manufacturer refurbished products offer a cost-effective alternative to buying new, while still providing high levels of quality, performance, and reliability.

Each unit is restored and tested by the vendor to strict compliance standards, often including updated firmware, full diagnostics, and a manufacturer warranty.

With substantial savings compared to new retail, refurbished equipment is an ideal option for organisations looking to optimise budgets without compromising performance.

While short lead times are common, some items may take longer to source depending on vendor stock availability and product lifecycles. Approximate lead times are typically 8-12 weeks.

To explore manufacturer refurbished options, submit an enquiry with your requirements. We’ll confirm availability, assess suitability for your environment, and provide the best possible commercial terms.

SCC refurbished pricing applies to pre-owned hardware that has been professionally restored, tested, and certified to meet high performance and reliability standards.

These products offer a significantly more cost-effective alternative to new retail units, while still delivering the functionality and quality required for business environments. Every device is rigorously tested and quality-assured by our in-house experts, with a minimum 1-year warranty.

Pricing for refurbished equipment is influenced by factors such as product condition, age, availability, and component updates. As stock levels can change quickly, any prices shown on our site represent the latest guidance based on current market conditions.

If you’re planning an upgrade, refresh, or expansion and want to explore SCC refurbished options, simply submit an enquiry today with your requirements.

Vendor promotions are limited-time incentives provided by the manufacturer or distribution channel. These can include discounted pricing, bundled offers, software credits, extended warranties, or rebates that reduce the overall cost of your project.

Our team monitors vendor programmes daily to ensure you benefit from current promotional opportunities across all major brands. See our latest vendor offers here. 

Alternatively, submit an enquiry with your project or upgrade requirements. We’ll check for relevant active promotions and advise you on the most cost-effective combination of discounts, bundles, or incentives available.

Our price match commitment ensures you receive competitive pricing on IT hardware and software.

If you find the same product at a lower price from a reputable UK supplier, share the link or formal quote with us. We’ll review it to match or beat the offer.

We will verify the details, checking stock and warranty conditions to assess whether improved commercial terms are available through our vendor partnerships or alternative sourcing.

We’re committed to fair, transparent pricing and will always explore the best options for your project – whether that’s matching a competitor or offering a more cost-effective alternative. Get in touch to secure the best possible price for your requirements.

Description

Synology RackStation RS4021XS+. Supported storage drive types: HDD & SSD, Storage drive interface: Serial ATA II, Serial ATA III, Storage drive sizes supported: 2.5,3.5″. Processor family: Intel® Xeon®, Processor manufacturer: Intel, Processor model: D-1541. Internal memory: 16 GB, Internal memory type: DDR4, Maximum RAM supported: 64 GB. LAN data rate supported (max): 10000 Mbit/s. Chassis type: Rack (3U), Cooling type: Active, Product colour:

Securing your business assets
The 16-bay RS4021xs+ provides solid data security and lightening- 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.

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

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.

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.

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 RTOs and minimal service disruption.

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

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.

Additional information

Weight 3 kg
Processor model

D-1541

Product Condition

Processor family

Intel® Xeon®

RAID levels

5, 6

Ethernet LAN (RJ-45) ports

6

Chassis type

Rack (3U)

Weight

17.4 kg

Redundant power supply (RPS) support

Yes

Power consumption (typical)

145.79 W

Operating relative humidity (H-H)

5 – 95%

Operating temperature (T-T)

0 – 35 °C

Storage temperature (T-T)

-20 – 60 °C

Certification

FCC
CE
BSMI
VCCI
RCM
EAC
CCC
KC
UL

Number of fans

3 fan(s)

Noise level

44.7 dB

Wake-on-LAN ready

Yes

Product colour

Black

Processor cores

8

Memory slots

4

Depth

656.5 mm

Height

132.3 mm

Width

482 mm

Ethernet LAN

Yes

Processor frequency

2.1 GHz

RAID support

Yes

AC input frequency

50 – 60 Hz

AC input voltage

100 – 240 V

On/off switch

Yes

Backup function

Yes

Device class

Small & Medium Business

Built-in display

No

Maximum RAM supported

64 GB

Power supply unit (PSU) capacity

800 W

Storage drive interface

Serial ATA II, Serial ATA III

Installed storage drive type

No

Supported storage drive types

HDD & SSD

Storage drives installed

No

Number of storage drives supported

16

Cooling type

Active

Fan diameter

8 cm

USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity

2

Ethernet LAN data rate supported (max)

10000 Mbit/s

CPU configuration (max)

1

Processor boost frequency

2.7 GHz

Conflict-Free processor

Yes

Intel TSX-NI

Yes

Intel Virtualization Technology (VT-x)

Yes

Intel Secure Key Technology version

1.00

Intel 64

Yes

Intel Enhanced Halt State

Yes

Intel Trusted Execution Technology

Yes

Intel VT-x with Extended Page Tables (EPT)