RS4021xs+ | RackStation RS4021xs+

Name: RS4021xs+ | RackStation RS4021xs+
Brand: Synology
SKU: 11952
Availability: InStock
Rating: 4 (1 reviews)

Model: RS4021xs+
Processor: Intel Xeon D-1541 8-Core 2.1 GHz
Memory: 16GB DDR4 ECC (up to 64GB)
Storage: 16 x 3.5"/2.5" SATA III bays
Network: 2 x 10GbE, 4 x 1GbE
Dimensions: 132.3 x 482 x 656.5 mm
Weight: 17.4 kg (diskless)

Description
Reviews (1)

RackStation RS4021xs+

High-Performance Storage

The Synology RackStation RS4021xs+ is a 16-bay 3U NAS powered by an Intel Xeon D-1541 8-core 2.1 GHz processor with 16GB DDR4 ECC RAM (upgradable to 64GB). It delivers up to 234,698 4K random read IOPS and 6,258 MB/s sequential read, ideal for virtualization and collaboration. Supporting 256TB (16x16TB) with RAID 0, 1, 5, 6, 10, JBOD, and F1, it uses Btrfs for snapshots. Expandable to 40 bays with two RX1217/RP units.

Robust Connectivity

Features two 10GbE and four 1GbE RJ45 ports with link aggregation/failover, plus two PCIe 3.0 x8 slots for 10GbE NICs or M.2 NVMe SSD cache. Two USB 3.2 Gen 1 ports and two expansion ports enhance connectivity. Synology DSM supports file sharing, cloud backups, and iSCSI LUN. Synology High Availability ensures minute-level failover with dual units.

Enterprise Features

Synology Surveillance Station supports up to 90 IP cameras with AES-256 encryption and analytics. Dual 800W PSUs and hot-swappable fans ensure uptime. DSM provides Virtual Machine Manager, Synology Office, and Hyper Backup. Users praise performance but note its size (19” deep) and lack of Synology Hybrid RAID. A 5-year warranty ensures reliability.

Synology RackStation RS4021xs+: All Features

Processor	Intel Xeon D-1541 8-Core 2.1 GHz (2.7 GHz Turbo)
Memory	16GB DDR4 ECC UDIMM (up to 64GB)
Storage	16 x 3.5"/2.5" SATA III bays
Network	2 x 10GbE, 4 x 1GbE RJ45
Ports	2 x USB 3.2 Gen 1, 2 x PCIe 3.0 x8, 2 x expansion
RAID Support	RAID 0, 1, 5, 6, 10, JBOD, F1
Software	DSM, Surveillance Station, Hyper Backup, VMM
Security	AES-256 encryption, Btrfs snapshots, SHA
Multimedia	Up to 90 IP cameras, DSM media apps
Compatibility	Windows 7+, macOS 10.12+, Linux, iOS, Android

Synology RackStation RS4021xs+: All Specifications

Model	RS4021xs+
Processor	Intel Xeon D-1541 8-Core 2.1 GHz (2.7 GHz Turbo)
Memory	16GB DDR4 ECC UDIMM (up to 64GB)
Drive Bays	16 x 3.5"/2.5" SATA III (hot-swappable)
Max Capacity	256TB (16 x 16TB), 640TB with expansion
RAID Support	RAID 0, 1, 5, 6, 10, JBOD, F1
File System	Btrfs, EXT4; External: EXT3, EXT4, NTFS, FAT32, HFS+, exFAT
Ports	2 x USB 3.2 Gen 1, 2 x PCIe 3.0 x8, 2 x expansion
Performance	234,698 4K read IOPS, 6,258 MB/s read
Encryption	AES-256, hardware-accelerated
Operating System	Synology DSM
Power Supply	Dual 800W, 100-240V AC, 50/60 Hz
Power Consumption	145.79W (access), 62.68W (HDD hibernation)
Cooling	3 x 80mm hot-swappable fans
Operating Temperature	0°C to 35°C
Non-Operating Temperature	-20°C to 60°C
Noise Level	44.7 dB(A)
Dimensions (HxWxD)	132.3 x 482 x 656.5 mm
Weight	17.4 kg (diskless)
System Compatibility	Windows 7+, macOS 10.12+, Linux, iOS, Android
Certifications	FCC, CE, BSMI, VCCI, RCM, EAC
Warranty	5-year limited
Package Contents	NAS, rail kit, 2 x AC cords, accessory pack