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    Synology RackStation RS818+ ​/ ​RS818RP+ 4 Bay

    Manufacturer: Synology
    Brand Synology Wi-Fi No Hard Disk Capacity No Capacity Warranty 7 Day Replacement LAN Yes AC Powerd No USB Version 2.0, 3.0
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    Powerful and scalable storage solution


    Synology RackStation RS818+/RS818RP+ comes with a quad-core processor with the AES-NI hardware encryption engine, quad 1GbE LAN ports, and optional 10GbE NIC support. It provides both high performance and a scalable storage solution for sharing files across different platforms, centralizing data backups, and protecting critical assets.


    Download Datasheet




    Quad-core 2.4GHz




    2GB DDR3, up to 16GB


    High Performance


    Over 1,291 MB/s sequential reading1


    Compact and Efficient


    Up to 8 drives with RX418 expansion unit2


    Empower your storage with speedier performance


    RS818+/RS818RP+ allows network and memory upgrades to boost system performance.




    Optional 10GbE network adapter for bandwidth-intensive environments




    Performance optimization with optional dual-channel memory expansion




    Built for high service reliability


    RS818+/RS818RP+ comes with four 1GbE LAN ports to support Link Aggregation and failover. Synology High Availability support provides a reliable active/passive server cluster, keeping data and services online. Furthermore, RS818RP+ is equipped with redundant power supplies to deliver increased service continuity.




    Btrfs: Next generation storage efficiency


    The Btrfs file system introduces the most advanced storage technologies to meet the management needs of modern large scale businesses:




    Flexible Shared Folder and User Quota System provides comprehensive quota control on all user accounts and shared folders



    Snapshot Replication provides schedulable and storage capacity-saving data protection with 1,024 shared folder backups and 65,000 system-wide snapshots



    File or folder level data restoration makes data recovery fast and flexible



    Automatic file self-healing3 detects and recovers corrupted files without user intervention




    Learn more about the benefits of using Btrfs


    Real-time collaboration on your private cloud


    Synology Office is a collaboration package combining the convenience and usability of public clouds with the data privacy and security guaranteed by private clouds. It allows you to work seamlessly together on documents and spreadsheets in a protected environment.





    Real-time collaboration on the same online documents to boost productivity,





    Instant communication on Synology Chat during the editing of documents or spreadsheets





    Version control for you to navigate all the changes and retrieve previous versions with just a click



    Fully certified storage virtualization solutions


    Synology iSCSI storage fully supports most virtualization solutions to enhance work efficiency with easy management interface. VMware vSphere 6 and VAAI integration helps offload storage operations and optimizes computation efficiency. Windows Offloaded Data Transfer (ODX) speeds up data transfer and migration rate. OpenStack Cinder support turns your Synology NAS into a block-based storage component.



    Engineered for reliability, backed by Synology


    RS818+ is designed to reliably store your data and is backed by Synology's three-year hardware warranty. An optional two-year extended warranty is available in select regions for up to five years of coverage. Learn more




    Powered by Synology DSM



    Surveillance Station


    Complete surveillance solution for recording, monitoring, and management.


    Learn more



    Desktop Backup


    Simplified backup solution for your Mac, PC, and mobile devices.


    Learn more



    Hyper Backup


    Store multiple backup versions with block-level incremental data backup and cross-version deduplication.


    Learn more



    DSM UI


    Award-winning operating system with an intuitive user interface and powerful capabilities.


    Learn more





    Comprehensive built-in security tools are constantly updated to protect your devices against evolving threats.


    Learn more



    All-in-one server


    Save additional investment by integrating various network services, web/mail services, management applications into your NAS.


    Learn more




    1Power indicator
    2Power button
    3Alert indicator
    4Drive status indicator


    5Beep off button
    6Status indicator
    7Drive tray
    8Power port


    10Console port
    111GbE RJ-45 port
    12USB 3.0 port


    13eSATA port
    14PCIe expansion slot




    Hardware Specs


    Software Specs


    CPU CPU Model Intel Atom C2538
      CPU Architecture 64-bit
      CPU Frequency Quad Core 2.4 GHz
      Hardware Encryption Engine (AES-NI)  
    Memory System Memory 2 GB DDR3
      Memory Module Pre-installed 2 GB (2 GB x 1)
      Total Memory Slots 2
      Memory Expandable up to 16 GB (8 GB x 2)

    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.

    Storage Drive Bays 4
      Maximum Drive Bays with Expansion Unit 8
      Compatible Drive Type* (See all supported drives)

    3.5" SATA HDD

    2.5" SATA HDD

    2.5" SATA SSD

      Maximum Internal Raw Capacity 64 TB (16 TB drive x 4) (Capacity may vary by RAID types)
      Maximum Raw Capacity with Expansion Units 128 TB (64 TB + 16 TB drive x 4) (Capacity may vary by RAID types)
      Maximum Single Volume Size* 108 TB
      Hot Swappable Drive  

    "Compatible drive type" indicates the drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay.

    The maximum raw capacity is not limited by the maximum single volume size. Synology NAS models may utilize capacities over the maximum single volume size as long as each volume created is below the limit. (Learn more)

    Expansion of the internal volume is only supported if the combined single volume size does not exceed the maximum limit of 108 TB.

    External Ports RJ-45 1GbE LAN Port 4 (with Link Aggregation / Failover support)
      USB 3.0 Port 2
      eSATA Port 1
    PCIe PCIe Expansion 1 x Gen2 x8 slot (x4 link)
      Add-In-Card Support

    PCIe Network Interface Card (Learn more)

    M2D18 - Dual M.2 SATA SSD adapter card for SSD cache

      Notes RS818(RP)+ with M2D18 can only support M.2 SATA SSD. M.2 NVMe/AHCI PCIe SSD is not supported.
    File System Internal Drives



      External Drives








      Notes exFAT Access is purchased separately in Package Center.
    Appearance Form Factor (RU) 1U
      Size (Height x Width x Depth) 44 mm x 480 mm x 492.6 mm
    44 mm x 480 mm x 518.6 mm (for RP model)
      Weight 6.21 kg
    7.63 kg (for RP model)
      Rack Installation Support 4-post 19" rack (Synology Rail Kit - RKM114/RKS1317)
      Notes The rail kit is sold separately
    Others System Fan 40 mm x 40 mm x 2 pcs
    40 mm x 40 mm x 2 pcs (for RP model)
      Fan Speed Mode

    Full-Speed Mode

    Cool Mode

    Quiet Mode

      Power Recovery  
      Noise Level* 28.5 dB(A)
    32.7 dB(A) (for RP model)
      Scheduled Power On / Off  
      Wake on LAN / WAN  
      Power Supply Unit / Adapter 100 W
      Redundant Power Supply yes (for RP model)
      AC Input Power Voltage 100 V to 240 V AC
      Power Frequency 50/60 Hz, Single Phase
      Power Consumption* 45.28 W (Access)
    20.81 W (HDD Hibernation)
    45.73 W (Access) (for RP model)
    21.79 W (HDD Hibernation) (for RP model)
      British Thermal Unit 154.61 BTU/hr (Access)
    71.05 BTU/hr (HDD Hibernation)
    156.14 BTU/hr (Access) (for RP model)
    74.4 BTU/hr (HDD Hibernation) (for RP model)

    Power consumption is measured when fully loaded with Western Digital 1TB WD10EFRX hard drive(s).

    Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in idle; Two G.R.A.S. Type 40AE microphones, each set up at 1 meter away from the Synology NAS 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 5°C to 35°C (40°F to 95°F)
      Storage Temperature -20°C to 60°C (-5°F to 140°F)
      Relative Humidity 5% to 95% RH









    Warranty 3-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)
    Environment RoHS Compliant
    Packaging Content

    Main Unit X 1

    Accessory Pack X 1

    AC Power Cord X 1

    AC Power Cord X 2 (for RP model)

    Quick Installation Guide X 1

    Optional Accessories

    Surveillance Device License Pack

    RAM1600DDR3L-8GBx2 DDR3 non-ECC SO-DIMM kit

    RAM1600DDR3L-4GBx2 DDR3 non-ECC SO-DIMM kit

    Expansion Unit: RX418 X 1

    Synology Ethernet Adapter E10G17-F2

    Synology Ethernet Adapter E10G18-T1

    Synology Ethernet Adapter E10G18-T2

    Synology M2D18 M.2 SSD adapter card

    Synology Rail Kit Sliding - RKS1317

    Synology Rail Kit Mounted - RKM114




    Software Specs


    DSM Specifications
    Storage Management Maximum Internal Volume Number 64
      Maximum iSCSI Target Number 128
      Maximum iSCSI LUN 256
      iSCSI LUN Clone/Snapshot, Windows ODX  
      SSD Read / Write Cache (White Paper)  
      SSD TRIM  
      Supported RAID Type

    Synology Hybrid RAID



    RAID 0

    RAID 1

    RAID 5

    RAID 6

    RAID 10

      RAID Migration

    Basic to RAID 1

    Basic to RAID 5

    RAID 1 to RAID 5

    RAID 5 to RAID 6

      Volume Expansion with Larger HDDs

    Synology Hybrid RAID

    RAID 1

    RAID 5

    RAID 6

    RAID 10

      Volume Expansion by Adding a HDD

    Synology Hybrid RAID


    RAID 5

    RAID 6 (with Expansion Unit)

      Global Hot Spare Supported RAID Type

    Synology Hybrid RAID

    RAID 1

    RAID 5

    RAID 6 (with Expansion Unit)

    RAID 10 (with Expansion Unit)

    File Services File Protocol CIFS/AFP/NFS/FTP/WebDAV
      Maximum Concurrent CIFS/AFP/FTP Connections 500
      Maximum Concurrent CIFS/AFP/FTP Connections (with RAM expansion) 2,000
      Windows Access Control List (ACL) Integration  
      NFS Kerberos Authentication  
    Account & Shared Folder Maximum Local User Accounts 2,048
      Maximum Local Groups 256
      Maximum Shared Folder 512
      Maximum Shared Folder Sync Tasks 8
    High Availability Synology High Availability  
    Log Center Syslog Events per Second 800
    Virtualization VMware vSphere 6 with VAAI  
      Windows Server 2012  
      Windows Server 2012 R2  
      Windows Server 2016  
      Citrix Ready  
    General Specifications Networking Protocols SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
      Supported Browsers




    Internet Explorer 10 onwards

    Safari 10 onwards

    Safari (iOS 10 onwards)

    Chrome (Android 6.0 onwards)

      Supported Language English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย, 日本語, 한국어, 繁體中文, 简体中文
    Add-on Packages view the complete package list
    Antivirus by McAfee (Trial)  
    Central Management System  
    Synology Chat Maximum Users 1,500

    The number of concurrent HTTP connections for Synology Chat was configured to the maximum.

    CPU and RAM usage were both under 80% when the number of maximum users was reached.

    For tested models with expandable memory, the maximum amount of RAM was installed.

    Cloud Station Server Recommended Number of Hosted Files 1,000,000
      Recommended Number of Concurrent Sync Clients 500 (the number of connections that can be maintained when the recommended number of hosted files was reached)

    The maximum number of concurrently connected devices refers to the maximum number of devices that can remain connected at the same time.

    The maximum number of hosted files refers to the maximum number of files that can be indexed and hosted by the Cloud Station Server service. RAM expansion was not used during testing.

    Non-encrypted shared folders were used during the aforementioned testing.

    Document Viewer  
    Download Station Maximum Concurrent Download Tasks 80
    exFAT Access (Optional)  
    Synology MailPlus / MailPlus Server Free Email Accounts 5 (Licenses required for additional accounts)
      Maximum Number of Concurrent Users 100
      Maximum Server Performance 897,000 emails per day, approx. 27GB

    The CPU and RAM usage were both under 80% when testing the maximum number of concurrent users.

    For tested models with expandable memory, the maximum amount of RAM was installed.

    The performance of the mail system will slightly decrease in high-availability mode due to data synchronization between the two servers.

    Functions that were enabled in all of the tests above: anti-spam, anti-virus, DNSBL, greylist, content scan, full-text search (English only).

    Media Server DLNA Compliance  
    Moments Facial Recognition  
      Subject Recognition  
      Auto Color & Rotate  
      Moments Select  
    Snapshot Replication Maximum Snapshots per Shared Folder 1,024
      Maximum of System Snapshots 65,536
    Surveillance Station Maximum IP cam (Licenses required) 40 (including 2 Free License) (See All Supported IP Cameras)
      Total FPS (H.264)* 1200 FPS @ 720p (1280x720)
    900 FPS @ 1080p (1920x1080)
    320 FPS @ 3M (2048x1536)
    270 FPS @ 5M (2591x1944)
    120 FPS @ 4K (3840x2160)
      Total FPS (H.265)* 1200 FPS @ 720p (1280x720)
    1200 FPS @ 1080p (1920x1080)
    560 FPS @ 3M (2048x1536)
    300 FPS @ 5M (2591x1944)
    200 FPS @ 4K (3840x2160)
      Total FPS (MJPEG)* 540 FPS @ 720p (1280x720)
    200 FPS @ 1080p (1920x1080)
    150 FPS @ 3M (2048x1536)
    90 FPS @ 5M (2591x1944)
      Notes Surveillance Station throughput is tested with Axis network camera, using continuous recording with live view from Surveillance Station and motion detection by camera. Live view and recording are sharing the same stream from the camera.
    Synology Drive Recommended Number of Hosted Files 1,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
      Recommended Number of Concurrent Sync Clients 550 (the number of connections that can be maintained when the recommended number of hosted files was reached)

    For tested models with expandable memory, the maximum amount of RAM was installed.

    Exceeding the limits above may result in longer response time in file operations.

    Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.

    Synology Office Maximum Users 1,800

    Multiple files were opened for testing and each file was edited by 30 users simultaneously.

    CPU and RAM usage were both under 80% when the number of maximum users was reached.

    For tested models with expandable memory, the maximum amount of RAM was installed.

    Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM

    Video Station Video Transcoding Group 1 - Type 1 (See more)
      Maximum Transcoding Channel Number 1 channel, 30 FPS @ 1080p(1920×1080), H.264 (AVC)/MPEG-4 Part 2 (XVID, DIVX5)/MPEG-2/VC-1
    Virtual Machine Manager Recommended Virtual Machine Instances 4 (Learn more)
      Recommended Virtual DSM Number(Licenses required) 4 (including 1 Free License)

    Virtual Machine Manager is not supported on hosts running Synology High Availability.

    The specifications vary depending on system configuration and memory size.

    VPN Server Maximum Connections 20
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