Please ensure Javascript is enabled for purposes of website accessibility
Products
Solutions
Instabuilder
Deals Financing About Help 1-866-766-4629
The AVADirect Advantage
Assembled & Supported in
Twinsburg, OH
The Most Customizable PCs:
1000+ Cases & Component Options
Hand-Assembled PCs
since 2000
Built to Ship Safely – Custom foam protects your PC in transit
Home › Components › Barebones › Network Attached Storage (NAS) › Rackmount NAS
RS4021xs+ 16-bay 3U NAS Server, Intel® Xeon® D-1541 8-core 2.7 GHz processor, 64GB DDR4 RAM (16GB pre-installed), SATA 6Gb/s, 1GbLAN / 4, 10GbLAN / 2, USB 3.2 Gen 1 (Type-A) / 2, 800W Rdt PSU
RS4021xs+ 16-bay 3U NAS Server, Intel® Xeon® D-1541 8-core 2.7 GHz processor, 64GB DDR4 RAM (16GB pre-installed), SATA 6Gb/s, 1GbLAN / 4, 10GbLAN / 2, USB 3.2 Gen 1 (Type-A) / 2, 800W Rdt PSU
RS4021xs+ 16-bay 3U NAS Server, Intel® Xeon® D-1541 8-core 2.7 GHz processor, 64GB DDR4 RAM (16GB pre-installed), SATA 6Gb/s, 1GbLAN / 4, 10GbLAN / 2, USB 3.2 Gen 1 (Type-A) / 2, 800W Rdt PSU

RS4021xs+ 16-bay 3U NAS Server, Intel® Xeon® D-1541 8-core 2.7 GHz processor, 64GB DDR4 RAM (16GB pre-installed), SATA 6Gb/s, 1GbLAN / 4, 10GbLAN / 2, USB 3.2 Gen 1 (Type-A) / 2, 800W Rdt PSU

  • SKU: 13822222
  • Manufacturer: SYNOLOGY
  • MPN: RS4021XS+
  • Availability: USUALLY SHIPS WITHIN 3-5 DAYS
Price
$6,660.15
Quantity:
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
  • 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.