Synology RS4021xs+
RackStation NAS server 16 bays rack-mountable SATA 6Gb/s RAID 0 1 5 6 10 JBOD 5
Key facts
- Part number
- RS4021xs+
- Brand
- Synology
- Category
- RAID controllers
- Price
- AUD 12,999≈ USD 9,128 Reference price (RRP)
- Availability
- On request — ask for a quote
Overview
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.
CPU Model Intel Xeon D-1541
CPU Architecture 64-bit
CPU Frequency 8-core 2.1 (base) / 2.7 (turbo) GHz
Hardware Encryption Engine (AES-NI)
System Memory 16 GB DDR4 ECC UDIMM
Total Memory Slots 4
Maximum Memory Capacity 64 GB (16 GB x 4)
Maximum Drive Bays with Expansion Unit 40 (RX1217/RX1217RP x 2)
Hot Swappable Drive
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
PCIe Expansion 2 x Gen3 x8 slots (x8 link)
Form Factor (RU) 3U
Rack Installation Support* 4-post 19' rack (Synology Rail Kit - RKS1317) not included
System Fan 80 mm x 80 mm x 3 pcs
Mention: If NAS use over 8TB HDD, please only chose Synolgy Brand HDD
Reference price history
Recorded reference and list prices over time. Not Prology selling prices.
- Latest
- AUD 12,999≈ USD 9,128
- Oct 2026
- Lowest recorded
- AUD 12,999≈ USD 9,128
- Highest recorded
- AUD 12,999≈ USD 9,128
- Recorded
- 2026
- 1 price point
AUD 12,999 rrp, recorded
Buy or sell Synology RS4021xs+
Buying Synology RAID controllers
Looking to buy the Synology RS4021xs+ or a compatible RAID controller? Prology supplies new, refurbished and used Synology RAID controllers in Australia and the United States. Send the part number and quantity for a firm price.
Selling Synology RAID controllers
Have a spare or decommissioned RS4021xs+? Prology buys used and surplus Synology RAID controllers — single units or whole lots — and replies with an offer within 1 business day. Sell your RS4021xs+.
- What is the Synology RS4021xs+?
- The Synology RS4021xs+ is a Synology RAID controller – RackStation NAS server 16 bays rack-mountable SATA 6Gb/s RAID 0 1 5 6 10 JBOD 5 hot spare.
- How much does the Synology RS4021xs+ cost?
- The reference price on record is AUD 12,999 (Oct 2026). It is a reference figure, not a selling price — ask Prology for a firm quote.
- Where can I buy the Synology RS4021xs+?
- It is not listed on the Prology store yet. Prology sources Synology RAID controllers on request — request a quote and we reply with a firm price and lead time within 1 business day.
- Can I sell a used Synology RS4021xs+?
- Yes. Prology buys used and surplus Synology RAID controllers, including the RS4021xs+. Get an offer — sell outright or trade in against your next order.
Request a quote for RS4021xs+
Tell us the quantity and condition you need. Prology replies with a firm price and lead time within 1 business day.