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Synology RackStation RS2421+ High-performance, general purpose storage solution for small to medium sized businesses.

Synology RackStation RS2421+ High-performance, general purpose storage solution for small to medium sized businesses.

CPU: AMD Ryzen V1500B 4-core 2.2 GHz, RAM: 4 GB DDR4 ECC SODIMM (Max 32 GB), Gigabit LAN Port x4, USB 3.2 Gen 1 Port x2, Expansion Port x1, Gen3 x8 slot (x4 link) x1, 3 Years Warranty


80,500.00 บาท (รวมภาษี)


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RackStation RS2421+​/​RS2421RP+

High-performance, general purpose storage solution for small to medium sized businesses.

Synology NAS RackStation RS2421+

Secure storage for your business

Synology RS2421+/RS2421RP+ are versatile 2U 12-bay storage servers designed to accommodate a diverse set of business environments. Scalable up to 24 drives, they are designed for cost-effective file management and sharing and include powerful backup capabilities designed for businesses with a growing data footprint. The unit delivers 2,200 MB/s 64K sequential read and 1154 MB/s sequential write performance1, and can be optionally enhanced with SSD cache and 10/25Gb Ethernet2.

Download Datasheet



AMD Ryzen V1500B quad-core 2.2 GHz



2,200 MB/s seq. read and 1154 MB/s seq. write performance1



4 GB ECC DDR4, up to 32 GB



Up to 24 drive bays with RX1217(RP)

High performance storage for anything

Over 106K/59K random read/write IOPS and up to 2,200/1,154 MB/s sequential read/write throughput ensure ample performance for demanding workloads.1

* compared to predecessor RS2418(RP)+


4K Random IOPS


Sequential Throughput

Built for reliability

Redundant power3

Reduce the possibility of power disruptions on a single distribution channel or PDU adversely impacting data and service availability.

Near-zero downtime

Pair two identical devices with Synology High Availability and enable automatic minute-level failover between both devices in the event one server fails. Learn more

Data integrity and protection

ECC memory brings higher system reliability, while the Btrfs file system helps prevent data corruption, supports snapshot technology, and simplifies data protection. Learn more

Customize to suit

Easily adapt RS2421+/RS2421RP to any business environment by adding faster networking, local SSD cache, or storage capacity.2

  • 10/25GbE ready

    Support for 10/25GbE NICs lets you boost maximum network throughput using Link Aggregation (bonding).


  • SSD cache4

    Boost read/write IOPS over HDD-only arrays by up to 16 times or more with NVMe or SATA SSD Cache

  • Storage expansion

    Expand to 24 drive bays with a RX1217(RP) expansion unit

License-free backup solutions

Back up your NAS to other devices

Serving remote workforces

Keep your remote workforce connected with powerful out-of-the-box solutions for collaboration, file sharing, and communication.

  • drive

    Synology Drive

    Host your own private cloud behind the safety of your NAS with 100% data ownership and no subscription fees. Learn more

  • office

    Synology Office

    Create documents, spreadsheets, and slides in a multi-user environment. Real-time collaboration and automatic saving make remote work sessions a breeze. Learn more

  • chat

    Synology Chat

    Discuss and collaborate with colleagues using secure messaging designed for teams, with mobile, desktop, and browser clients. Learn more

Storage for virtualization

DSM streamlines provisioning for and management of virtual machines with full certification for VMware® vSphere, Microsoft® Hyper-V®, Citrix® XenServer, and OpenStack virtualization environments.
Synology Storage Console for VMware or Windows platforms lets you manage storage directly from your hypervisor. VMware VAAI integration and Windows ODX help offload storage operations and speed up data transfer. Learn more

Works best with Synology drives

Engineered to handle intensive 24/7 workloads, Synology drives consistently deliver top-grade performance.

Powered by Synology DiskStation Manager

The web-based DiskStation Manager (DSM) operating system supports a host of native productivity and management solutions.

Central Management System

Central Management System

Conveniently manage your fleet of Synology NAS from a centralized console.

Learn more
Synology Drive

Synology Drive

Instantly access your NAS files across multiple devices whenever you want, wherever you are.

Learn more
Collaboration Suite

Collaboration Suite

Satisfy all team collaboration needs behind the safety of your own private cloud with Synology Office, Calendar, and Chat.

Learn more
Virtual Machine Manager

Virtual Machine Manager

Run various operating systems in isolated sandboxes. Seamlessly clone, store, and migrate virtual machines.

Learn more


Secure data with comprehensive built-in security tools to protect your devices against evolving threats.

Learn more
Surveillance Station

Surveillance Station

Complete surveillance solution for recording, monitoring, and management.

Learn more


  1. Performance testing conducted by Synology with 10GbE NICs installed. Actual results may vary depending on system configuration, testing methods, and other environmental variables. Check the performance page for specific details on the testing environment.
  2. Network adapter cards, expansion units, other PCIe add-in cards, and storage drives are sold separately. Refer to thecompatibility list for compatible devices.
  3. Redundant power only available in the RS2421RP+ model.
  4. SSD cache can be enabled by using compatible 2.5" SSDs in drive bays or without occupying drive bays by installing Synology SNV3500 M.2 22110 NVMe SSDs using M2D20 or E10M20-T1 adapter cards, sold separately. The RS2421(RP)+ does not support SNV3400 NVMe SSDs.
  5. Pictured is a single SNV3500 installed in an E10M20-T1.
  6. Users have reported total data size reductions of more than 50% when backing up multiple systems with deduplication technology enabled.

Hardware Specifications

  • CPU

    CPU Model AMD Ryzen V1500B

    CPU Quantity 1

    CPU Architecture 64-bit

    CPU Frequency 4-core 2.2 GHz

    Hardware Encryption Engine (AES-NI)


    System Memory 4 GB DDR4 ECC UDIMM

    Memory Module Pre-installed 4 GB (4 GB x 1)

    Total Memory Slots 2

    Maximum Memory Capacity 32 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 12

    Maximum Drive Bays with Expansion Unit 24 (RX1217/RX1217RP x 1)

    Compatible Drive Type* (See all supported drives)
    • 3.5" SATA HDD
    • 2.5" SATA HDD
    • 2.5" SATA SSD

    Maximum Single Volume Size* 108 TB

    Hot Swappable Drive

    • 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.
    • Each internal volume (may consist of multiple drives) is expandable up to 108TB.

    External Ports

    RJ-45 1GbE LAN Port 4 (with Link Aggregation / Failover support)

    USB 3.2 Gen 1 Port* 2

    Expansion Port 1

    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 1 x Gen3 x8 slot (x4 link)

    File System

    Internal Drives
    • Btrfs
    • EXT4

    External Drives
    • Btrfs
    • EXT4
    • EXT3
    • FAT
    • NTFS
    • HFS+
    • exFAT*

    Notes exFAT Access is purchased separately in Package Center.


    Form Factor (RU) 2U

    Size (Height x Width x Depth) RS2421+ : 88 mm x 482 mm x 552 mmRS2421RP+ : 88 mm x 482 mm x 578 mm

    Weight RS2421+ : 11.5 kgRS2421RP+ : 11.9 kg

    Rack Installation Support* 4-post 19" rack (Synology Rail Kit - RKS1317)

    Notes The rail kit is sold separately


    System Fan 60 mm x 60 mm x 3 pcs

    Fan Speed Mode
    • Full-Speed Mode
    • Cool Mode
    • Quiet Mode

    Easy Replacement System Fan

    Power Recovery

    Noise Level* RS2421+ : 50.1 dB(A)RS2421RP+ : 54 dB(A)

    Scheduled Power On / Off

    Wake on LAN / WAN

    Power Supply Unit / Adapter RS2421+ : 500 WRS2421RP+ : 350 W

    Redundant Power Supply

    RS2421+ : - 

    RS2421RP+ :

    AC Input Power Voltage 100 V to 240 V AC

    Power Frequency 50/60 Hz, Single Phase

    Power Consumption* RS2421+ : 79.56 W (Access) 34.89 W (HDD Hibernation)
    RS2421RP+ : 91.76 W (Access) 48.21 W (HDD Hibernation)

    British Thermal Unit RS2421+ : 271.65 BTU/hr (Access) 119.13 BTU/hr (HDD Hibernation)
    RS2421RP+ : 313.31 BTU/hr (Access) 164.61 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 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


    • FCC
    • CE
    • BSMI
    • EAC
    • CCC
    • KC
    • UL
    • VCCI
    • RCM


    3 Years

    Notes The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)


    RoHS Compliant

    Packaging Content

    RS2421+ :
    • Main Unit X 1
    • Accessory Pack X 1
    • AC Power Cord X 1
    • Quick Installation Guide X 1
    RS2421RP+ :
    • 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.


    • Model specifications are subject to change without prior notice.
    • The figures are based on Synology internal testing. Each performance test is done individually. No other services or applications are processed at the same time.
    • The actual performance may be lower than lab testing figure due to differences in server configuration, deployment, and the number of active operations.
    • If usage requirements exceed the specifications above, please contact our regional partners for professional advice.

    Software Specifications

    see more...


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