Versatile and scalable storage

Synology RS2821RP+ is a 3U 16-bay storage server designed to accommodate a diverse set of business requirements. Scalable to 28 drives, the unit provides powerful backup and restoration functionality for the SMB sector. It delivers 2,200 MB/s sequential read and 105K 4K random read performance۱, and can be upgraded with SSD cache and 10/25Gb Ethernet۲ options.


Up to 28 drive bays with RX1217(RP)


۴ GB ECC DDR4, up to 32 GB


۲,۲۲۰ MB/s seq. read 105K 4K random read performance۱


AMD Ryzen™ V1500B quad-core 2.2 GHz

CPU Model AMD Ryzen V1500B
  CPU Quantity ۱
  CPU Architecture ۶۴-bit
  CPU Frequency ۴-core 2.2 GHz
  Hardware Encryption Engine (AES-NI)  
System Memory ۴ GB DDR4 ECC UDIMM
  Memory Module Pre-installed ۴ GB (4 GB x 1)
  Total Memory Slots ۲
  Maximum Memory Capacity ۳۲ GB (16 GB x 2)
  • 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.
  • 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.
Drive Bays ۱۶
  Maximum Drive Bays with Expansion Unit ۲۸ (RX1217/RX1217RP x 1)
  Compatible Drive Type* (See all supported drives)
  • ۳.۵″ SATA HDD
  • ۲.۵″ SATA HDD
  • ۲.۵″ SATA SSD
  Hot Swappable Drive  
  • Synology only guarantees full functionality, reliability, and performance for Synology drives listed on the compatibility list. The use of non-validated components may limit certain functionality and result in data loss and system instability.
  • “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 ۴ (with Link Aggregation / Failover support)
  USB 3.2 Gen 1 Port* ۲
  Expansion Port ۱
  Notes The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.
PCIe Expansion ۱ x Gen3 x8 slot (x4 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.
Form Factor (RU) ۳U
  Size (Height x Width x Depth) ۱۳۲.۳ mm x 482 mm x 656.5 mm
  Weight ۱۷.۱ kg
  Rack Installation Support* ۴-post 19″ rack (Synology Rail Kit – RKS-02)
  Notes The rail kit is sold separately
System Fan ۸۰ 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* ۵۳.۵ dB(A)
  Scheduled Power On / Off  
  Wake on LAN / WAN  
  Power Supply Unit / Adapter ۵۵۰ W
  Redundant Power Supply  
  AC Input Power Voltage ۱۰۰ V to 240 V AC
  Power Frequency ۵۰/۶۰ Hz, Single Phase
  Power Consumption* ۹۷.۵۴ W (Access)
۴۹.۵۷ W (HDD Hibernation)
  British Thermal Unit ۳۳۲.۶۱ BTU/hr (Access)
۱۶۹.۰۳ BTU/hr (HDD Hibernation)
  • Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX 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%
Operating Temperature ۰°C to 35°C (32°F to 95°F)
  Storage Temperature -۲۰°C to 60°C (-5°F to 140°F)
  Relative Humidity ۵% to 95% RH
  • FCC
  • CE
  • BSMI
  • EAC
  • CCC
  • KC
  • UL
  • VCCI
  • RCM
۳-year hardware warranty, extendable to 5-year coverage – EW202
  Notes The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
RoHS Compliant
Packaging Content
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
Optional Accessories
  Notes All memory modules will operate at the maximum frequency specified by the CPU manufacturer.

Synology Assistant


Operating System(DSM)


Hardware Installation Guide




RackStation RS2821RP+

۱۳-۱GbE RJ-45 port

۱۴-USB 3.2 Ports

۱۵-Expansion port

۱۶-Reset button

۹-Power Port

۱۰-PSU indicator

۱۱-Console port

۱۲-PCIe expansion slot

۵-Drive status indicator

۶-Drive tray

۷-Rail Kit Release Tab

۸-PSU fan

۱-Power button and indicator

۲-Status Indicator

۳-Alert Indicator

۴-Alert Off Button