Synology · NAS & Storage

Synology RackStation RS4021xs+ 16-Bay 3.5" SATA HDD NAS

Name: Synology RackStation RS4021xs+ 16-Bay 3.5" SATA HDD NAS
Brand: Synology
SKU: PRD-202607-5237

Synology RackStation RS4021xs+ 16-Bay 3.5" SATA HDD NAS - Key Features16 x 3.

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✓ Available to order · supplied & installed in Malaysia

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Key specifications
Form factor	Rackmount

Full specifications ↓

Product details

Key Features
- 16 x 3.5"/2.5" SATA Drive Bays
- 2.1 GHz Intel Xeon D-1541 Eight-Core
- 16GB of DDR4 ECC RAM
- 2 x 10GbE RJ45 | 4 x GbE RJ45
- 2 x USB 3.2 Gen 1 Type-A Ports
- RAID 0, 1, 5, 6, 10, Basic, F1, and JBOD
- 2 x PCIe 3.0 x8/x8 Slots
- AES-NI Hardware Encryption Engine
- Synology DiskStation Manager OS

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
Warranty
5 Years
Notes	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
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 VisualStation: VS360HD Surveillance Device License Pack
Notes	All memory modules will operate at the maximum frequency specified by the CPU manufacturer.