Description
Synology RS4021xs+ 2U 16 Bay Diskless NAS with Redundant Power
Synology Brand HDD Recommended to Support SMART Monitoring
Securing your business assets
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.
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.
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. 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.
CPU
CPU Model
Intel Xeon D-1541
CPU Architecture
64-bit
CPU Frequency
8-core 2.1 (base) / 2.7 (turbo) GHz
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)
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
Maximum Single Volume Size*
1 PB (64 GB memory required, for RAID 6 groups only)
200 TB (32 GB memory required)
108 TB
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
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
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)
4-post 19" rack (Synology Rail Kit - RKS1317)
Others
System Fan
80 mm x 80 mm x 3 pcs
Fan Speed Mode
Full-Speed Mode
Cool Mode
Quiet Mode
Noise Level
44.7 dB(A)
Power Supply Unit / Adapter
800 W
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)
Temperature
View AllClose
Additional Information
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