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Synology RS3621xs+ 12-Bay 2U Rackmount NAS Xeon D-1541 8GB DDR4 ECC 2x 10GbE Redundant PSU (Diskless)

Price:

$ 9,497.13


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Synology RS4021xs+ 16-Bay 3U Rackmount NAS Xeon D-1541 16GB DDR4 ECC 2x 10GbE Redundant PSU (Diskless)
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$ 11,975.49
$ 11,975.49

Synology RS3621xs+ 12-Bay 2U Rackmount NAS Xeon D-1541 8GB DDR4 ECC 2x 10GbE Redundant PSU (Diskless)

https://arcip.com.au/web/image/product.template/16579/image_1920?unique=92eeba9

Synology RackStation RS3621xs+ 12-bay 2U rackmount NAS (diskless). 8-core Intel Xeon D-1541 CPU, 8 GB DDR4 ECC memory expandable to 64 GB. 12 hot-swappable SATA bays, expandable to 36 with two RX1217RP/RX1217 units. Two 10GbE and four 1GbE RJ-45 ports, two PCIe Gen3 x8 slots for NVMe cache or 10/25GbE cards, redundant power supplies. Over 408,000 4K random read IOPS and 5,700 MB/s sequential read in Synology's testing. Btrfs, RAID F1, snapshots and Surveillance Station. Rail kit RKS-02 sold separately. 5-year warranty. Genuine Synology from ARC IP Networks, authorised Synology reseller with Australian stock.

$ 9,497.13 9497.13 AUD $ 9,497.13 incl. GST

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RS3621xs+

Synology RS3621xs+ at a glance

The Synology RS3621xs+ is a 12-bay 2U rackmount NAS running DiskStation Manager (DSM), powered by an 8-core Intel Xeon D-1541 with 8 GB DDR4 ECC memory, expandable to 64 GB. It has two built-in 10GbE and four 1GbE ports, two PCIe Gen3 x8 slots and redundant power supplies, and scales to 36 bays with two RX1217RP/RX1217 units.

ARC IP Networks is an authorised Synology reseller in Australia. We supply the Synology RS3621xs+ from Australian stock.

Drive bays12, up to 36 with expansion
CPUXeon D-1541, 8 cores
Networking2 x 10GbE + 4 x 1GbE
PowerRedundant PSUs

Best for

  • Enterprise file services, virtualisation and mail with high throughput
  • Business-critical storage that needs redundant power
  • Large surveillance deployments

Key features

8-core Intel Xeon D-1541 (2.1 GHz base / 2.7 GHz turbo) with a hardware encryption engine.

8 GB DDR4 ECC UDIMM pre-installed, four memory slots, expandable to 64 GB (16 GB x 4).

12 hot-swappable bays for 3.5" SATA HDDs or 2.5" SATA SSDs, expandable to 36 bays with two RX1217RP/RX1217 expansion units.

Two built-in 10GbE RJ-45 ports plus four 1GbE RJ-45 ports and two USB 3.2 Gen 1 ports.

Two PCIe Gen3 x8 slots for M.2 NVMe cache adapters and 10GbE/25GbE network cards.

Over 408,000 4K random read IOPS and 5,700 MB/s sequential read in Synology's testing.

Two redundant power supplies for business continuity.

Btrfs with snapshots, inline compression, file self-healing and RAID F1/0/1/5/6/10; volumes up to 1 PB (64 GB memory, RAID 6).

Surveillance Station with 2 free licences and up to 90 x 1080p cameras (H.264).

Synology RS3621xs+ specifications

Synology RS3621xs+ technical specifications
SpecificationValue
Processor & Memory
CPUIntel Xeon D-1541, 8 cores, 64-bit
CPU frequency2.1 GHz base / 2.7 GHz turbo
Hardware encryption engineYes
System memory8 GB DDR4 ECC UDIMM
Memory slots4
Maximum memory64 GB (16 GB x 4)
Storage
Drive bays12 x 3.5" SATA HDD or 2.5" SATA SSD
Maximum drive bays with expansion36 (RX1217 x 2)
Hot-swappable drivesYes
RAID typesRAID F1, Basic, JBOD, RAID 0, 1, 5, 6, 10
Maximum single volume1 PB (64 GB memory, RAID 6 only); 200 TB (32 GB memory); 108 TB
Ports & Expansion
RJ-45 10GbE LAN2
RJ-45 1GbE LAN4
USB 3.2 Gen 12
Expansion ports2
PCIe expansion2 x Gen3 x8 slots (x8 link)
Physical
Form factor2U
Size (H x W x D)88 mm x 482 mm x 724 mm
Weight14.5 kg
Rack installation4-post 19" rack (RKS-02 rail kit, sold separately)
System fans4 x 80 mm
Noise level50.2 dB(A)
Power
Power supply500 W, redundant (2 PSUs)
AC input100 V to 240 V AC, 50/60 Hz, single phase
Power consumption (access)142.5 W
Power consumption (HDD hibernation)72.76 W
Environment
Operating temperature0°C to 35°C
Storage temperature-20°C to 60°C
Operating humidity8% to 80% RH
Surveillance & Applications
Surveillance Station licences2 included
Max IP cameras (H.264)1080p: 90 channels, 2250 FPS
Max local user accounts5,120
Max shared folders512
Warranty
Hardware warranty5 years

Figures from Synology's official product information.

What's in the box

  • Main unit x 1
  • Accessory pack x 1
  • AC power cord x 2
  • Quick installation guide x 1

The Synology RS3621xs+ in depth

High-throughput 2U storage

The RS3621xs+ packs 12 drive bays into a 2U chassis with an 8-core Xeon processor and built-in dual 10GbE. Synology quotes over 408,000 4K random read IOPS and 5,700 MB/s sequential read, and two PCIe Gen3 x8 slots add NVMe cache or faster network cards.

Built for uptime and scale

Two redundant power supplies keep services running if one fails, and two RX1217RP/RX1217 expansion units take the system to 36 bays. Memory scales from 8 GB to 64 GB of ECC DDR4 for virtualisation, mail and collaboration workloads.

Enterprise data protection

DSM's Btrfs file system provides snapshots, file self-healing and inline compression, with Snapshot Replication, Hyper Backup and Active Backup Suite for comprehensive protection.

Frequently asked questions

Straight answers about the Synology RS3621xs+ from the ARC IP Networks team. Last reviewed October 2026.

No. The RS3621xs+ is diskless and the RKS-02 sliding rail kit is sold separately. Synology only guarantees full functionality for drives on its compatibility list, such as the HAT5300 Series HDDs and SAT5200 Series SSDs.

Yes. It has two redundant power supplies.

With two Synology RX1217RP or RX1217 expansion units it supports up to 36 drive bays.

It ships with 8 GB DDR4 ECC UDIMM and supports up to 64 GB (16 GB x 4) with Synology D4EC-2666-16G modules.

Synology provides a 5-year warranty from the purchase date.

ARC IP Networks is an authorised Synology reseller and supplies the RS3621xs+ from Australian stock.

Explore more Synology: Synology

Buy the Synology RS3621xs+ in Australia

ARC IP Networks is an authorised Synology reseller, supplying Synology products to homes, businesses and integrators across Australia.

  • Genuine Synology with the full manufacturer's warranty.
  • Australian stock, shipped Australia-wide.
  • Local pre-sales help choosing the right model.
  • Trade and project pricing available.

Need help choosing Synology?

Ask ARC IP Networks for project pricing or a quote, or call us to check the right Synology model for your site.

Brand Synology

Accurate Shipping Costs

Our online shipping calculator is designed to provide a final, accurate shipping cost based on the items in your cart and your delivery postcode. Shipping costs are calculated at checkout based on your order and delivery postcode. The final cost is calculated based on several factors which are automatically accounted for by our system, including:

  • The stock location of the item(s) across our warehouses.
  • Orders with multiple items that may require special packaging.
  • The weight and dimensions of the order (including heavy or oversized items).
  • The delivery courier servicing your specific region.

Delivery Times


 

Standard Processing


Most orders placed by 2pm AEDT are dispatched for next working day delivery. Larger orders may require 1-2 additional business days for processing. If timing is critical, please contact us to discuss expedited options (additional charges may apply).


Delivery Timeframes


Region

Processing Time

Express Delivery

Standard Delivery

VIC, NSW, SA, QLD Metro, TAS

1-2 business days

1-2 business days

2-4 business days

NT, WA, QLD Rural

1-2 business days

1-2 business days

3-5 business days

New Zealand

1-2 business days

2-3 business days

4-10 business days

Please note: Processing times may extend during peak periods such as Christmas and end of financial year.

Free Warehouse Pickup



Save on shipping costs with free pickup from our ARC IP Networks Blackburn warehouse. Simply place your order online or by phone, and collect during business hours (Monday to Friday). Please allow time for picking and packing. For urgent orders, call 1300 100 440 to confirm your order is ready.

ARC IP Networks Pickup Address: 6 George Street, Blackburn, VIC 3130


Insurance & Tracking



All ARC IP Networks shipments are fully insured and trackable. Once dispatched, you'll receive an email with your tracking number and courier website details. If your item is confirmed lost or damaged by our courier, we'll arrange a replacement in consultation with you.


International Shipping



ARC IP Networks ships to New Zealand. Please note:


  • Import duties and taxes vary by country
  • Buyers are responsible for all customs charges
  • Contact your local customs authority before ordering
  • We'll provide required documentation for smooth customs clearance
  • Buyers cover all shipping costs for returns due to refused duties/taxes


Delivery Requirements


Signature Required


All deliveries must be signed for. If you won't be home, contact our Sales Support team to arrange Authority to Leave. Important: Authority to Leave voids shipping insurance if parcels are lost or stolen.


Delivery Restrictions


We do not deliver to PO Boxes or Parcel Lockers as our couriers cannot access them. Orders sent to these addresses will be returned, incurring redelivery fees.


Shipping Issue Resolution


ARC IP Networks works closely with our shipping partners to resolve any delivery issues quickly and fairly:


  1. Confirmation: We verify expected delivery dates with our shipping partners
  2. Investigation: Issues outside normal timeframes trigger formal investigations
  3. Communication: We keep you updated throughout the resolution process
  4. Resolution: Confirmed lost items are replaced or refunded after investigation completion


Please note: Refunds for lost, missing, or delayed orders cannot be processed until shipping partner investigations are complete. This does not affect your rights under the Australian Consumer Law, and refunds or replacements will be provided where required once loss or damage is confirmed.

Warranty & Faulty Products

ARC IP Networks complies with the Australian Consumer Law (ACL).

If a product is faulty, damaged, not of acceptable quality, or does not perform as advertised, you are entitled to a repair, replacement, or refund in accordance with ACL.

Manufacturer Warranty Returns

For faults developing after 14 days within the warranty period:

  • Contact ARC IP Networks first at info@arcip.com.au or 1300 100 440
  • We will assess the issue and coordinate with manufacturers, authorised service centres, or distributors on your behalf
  • Where required, a manufacturer RMA may be arranged
  • ARC IP Networks manages the return process and next steps

Dead on Arrival (DOA)

Products that arrive faulty or damaged must be reported within 14 days of delivery.

ARC IP Networks will arrange assessment, replacement, or refund as appropriate.

Change of Mind & Non-Faulty Returns

Change-of-mind returns must be requested within 14 days of delivery. For change-of-mind returns, the product must be unused, unopened, in its original packaging, and returned with all accessories and documentation. These conditions apply only to change-of-mind returns and do not limit or exclude your rights under the Australian Consumer Law. Some products are not eligible for change-of-mind returns, including:

  • Ex-demo products
  • Clearance or markdown items
  • Special-order items
  • Products clearly marked “No Change-of-Mind Returns”

Important

This does not affect your rights under Australian Consumer Law.

If a product is faulty, not of acceptable quality, or does not meet advertised specifications, it remains eligible for return regardless of category.

Refunds & Processing Timeframes

  • Approved refunds are processed within 7 business days of receiving returned goods
  • Refunds are issued to the original payment method, unless otherwise agreed
  • Replacement or repair may be offered where appropriate
  • Store credit may be offered only with customer consent

Handling fees and non-returnable service charges may not be refundable where permitted by law.


Restocking Fees

For approved change-of-mind or non-faulty returns, a 15% restocking fee applies.

  • Any applicable restocking fee will be clearly communicated prior to return approval
  • The fee will be deducted from the refund amount
  • Restocking fees do not apply to returns made under the Australian Consumer Law, including faulty, damaged, or misrepresented goods.

Return Shipping Costs

  • Change-of-mind returns: The customer is responsible for return shipping costs.
  • Faulty or defective products: ARC IP Networks covers return shipping under Australian Consumer Law.

Non-Warranty Repairs

For issues not covered by warranty:

  • ARC IP Networks will provide a quote before proceeding
  • Customers are responsible for all shipping and service costs
  • No repairs are undertaken without customer approval

Return Methods

Returns may be made:

  • In-store at ARC IP Networks – 6 George Street, Blackburn VIC 3130
  • Or by shipment as instructed by our support team

Proof of purchase is required for all returns.

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