Installing DSM

IMPORTANT: Please read the following before installing this beta software.

  1. For evaluation only - This beta software is for evaluation purposes only and should not be installed in production environments. We strongly recommend reading the Release notes section and the Known Issues & Limitations section before installing. Synology cannot be held responsible for any damages, such as accidental data loss, caused by this beta software.
  2. Not downgradable - After installation, you will not be able to downgrade to a previous official version of this software.
To install the beta software on your Synology NAS
  1. Visit Download DSM > Applied Models to download the latest DSM update to your local computer.
  2. Enter Control Panel > Update & Restore > Click Manual DSM Update to enter Manual DSM Update Page.
  3. Click Browse to select the update file.
  4. Click Apply to start to update your DSM. The system will reboot automatically when the update completes.
  5. You can go to Support Center from main menu to help us out and report any issues or suggestions.

Download DSM

Applied Models
Report Bugs

Release notes


  1. DSM 6.2 Beta can only be installed on Synology products running DSM 6.0 and above.
  2. Starting from DSM 6.2, the core replication function is centrally managed by a new package, Replication Service. Packages with replication feature, such as Snapshot Replication, must install Replication Service package.
  3. For the following models, DSM 6.2 will be the last upgradable version. DSM 6.2 will continue to receive critical and security updates for a minimum of 2 years after the official release.
    • J Series : DS411slim, DS411j, DS211j, DS212j, DS112j, DS413j, DS213air
    • Value Series : DS411, DS211, DS111, DS212, RS212, DS112, DS413, DS213
    • Plus Series : DS2411+, DS1511+, DS411+II, DS411+, DS211+, DS1812+, DS1512+, DS412+, DS712+, DS212+, DS112+ DS213+
    • XS Series : DS3611xs, RS3411xs, RS3411RPxs, RS2211RP+, RS2211+, DS3612xs, RS3412xs, RS3412RPxs, RS2212RP+, RS2212+, RS812RP+, RS812+, RS812
    • Others : DDSM


What's New in DSM 6.2 Beta 2

  1. DSM

    • For an easier management, Key Manager can now be stored locally on Synology NAS. Encrypted shared folders can be auto-mounted without the need of a USB drive. (To achieve better data protection, users are suggested to store Key Manager in an external USB drive.)
    • Standard users can now right-click on shared folders in File Station to view Properties.
    • Added support for IBM WebSphere SSO.
    • Removed System Performance Tuning section in Control Panel.
    • Enhanced password strength policy for better account security.
    • Added support for a new SMS provider SendinBlue and new Clickatell API (RESTful).
  2. iSCSI Manager

    • Added support for network binding settings to allow each iSCSI target to map to a network interface.
    • Users can now disable storage reclamation for thin-provisioned LUNs to enhance I/O performance.
  3. Storage Manager

    • Users can remotely deactivate drives via Storage Manager for better management.
    • Added a default monthly S.M.A.R.T. test on both new and existing drives that were not previously configured.
    • DSM will remind users if bad sector/lifespan alert is not set up.
    • Made health status of disks uniform with storage pools and volumes.
    • Log Center now includes disk logs.
    • Enhanced data scrubbing usability.
  4. IHM tool

    • Added Seagate IronWolf Health Management (IHM) support on DS118, DS218play, DS418j ,and DS418.

Bug fixes

  1. Fixed an issue when a RAID 6 Storage Pool is degraded by two drive failures, it cannot be repaired with only one disk. This only affects specific models:
    • 18-series : DS3018xs
    • 17-series : FS3017, FS2017, RS4017xs+, RS3617xs, RS3617RPxs, DS3617xs, RS3617xs+, RS18017xs+
    • 16-series : RS18016xs+
    • 15-series : DS3615xs, RC18015xs+
    • 14-series : RS3614xs, RS3614RPxs, RS3614xs+
    • 13-series : RS3413xs+, RS10613xs+
  2. Enhanced read-write SSD cache error handling when the volume crashes.
  3. Fixed an issue where file transfer logs might be lost after adding or removing volume(s).
  4. Fixed an issue where Resource Monitor might not update usage history after a DSM reboot.
  5. Fixed an issue where home folder mounted via AFP cannot be found via Spotlight.
  6. Fixed an issue where connection timeout might occur upon editing shared folders when the domain/LDAP server is down.
  7. Fixed an issue where Package Center user interface might display abnormally on IE10 and IE11.
  8. Optimized search function and improved the arrangement of search results in Package Center.
  9. Fixed an issue where the background of login panel might be blurred when accessing DSM on Chrome.
  10. Fixed an issue where users might not be able to collapse and expand nested sections on DSM webpage on Safari 11.

Known Issues & Limitations

  1. DSM 6.2 is the last DSM version supporting IPv6 Tunneling in Network Interface.
  2. Starting from DSM 6.2, the USB device drivers, including printers, cloud printers, DAC/speakers, Wi-Fi dongles, DTV dongles, LTE dongles, and Bluetooth dongles, will no longer be updated.
  3. Wi-Fi dongle does not support Parental Control and Device List if set as Bridge Mode.

  4. SSH authentication by DSA public key is prohibited for security concerns.

  5. When logging in through VPN or Proxy server, some functionalities may have authentication issue. To fix this issue, please go to Control Panel > Security, and click Trusted Proxies button to add the trusted proxy server to the list.
  6. RDMA has been temporarily disabled in this version due to compatibility issues.
  7. The original RAID scrubbing schedule tasks will be migrated to Smart Data Scrubbing schedule tasks; the Data Scrubbing process will automatically be executed shortly after the upgrade.


What’s New in DSM 6.2 Beta

  1. iSCSI Manager

    • Brand new iSCSI Manager built for IT administrators, providing a new management user interface for optimized iSCSI management and monitoring experience.
    • Advanced LUN provides lightning-fast LUN snapshot creation, recovery, and LUN clone within seconds, as well as VAAI/ODX, storage acceleration commands, support for better VM performance. Since Advanced LUNs can utilize file system cache to provide better efficiency, block-level LUNs will no longer be supported on DSM 6.2 and onward. DSM 6.2 will still be compatible with the block-level LUNs upgraded from DSM 6.1 and prior.
    • Supports cross-volume LUN clones.
  2. Storage Manager

    • The brand new Overview shows the health status of all storage components on your NAS, displaying a clearer and better look on the system overview.
    • Introduced Storage Pool, a new storage component, to replace the original Disk Group and RAID Group, and rearrange storage-related functions to provide users with a more consistent and smoother experience.
    • Smart Data Scrubbing detects the supported file system and RAID type to perform data scrubbing automatically. A new built-in scheduler allows users to do data scrubbing periodically with just a few clicks, improving data integrity and consistency.
    • RAID resync speed can now be adjusted to accommodate to accommodate IT management needs.
  3. Synology High Availability Manager

    • A new Performance page is introduced to display more details of both active server and passive server, giving you an in-depth performance overview.
    • The new system update design now eliminates unnecessary system reboots on important updates while keeping your cluster secure but also maintain high service availability.
    • You can now choose to only replicate system configuration in the initial SHA cluster creation, providing a much more speedy cluster setup.
    • All controls to the cluster and servers have been redesigned to provide more intuitive and guided steps to perform essential operations like memory upgrade and fan replacement.
  4. Extended Btrfs File System Coverage

    • Btrfs file system is now available on more Synology NAS models utilizing ARM platforms. Enjoy the powerful features of the next-generation file system.
    • Applied Models:
      • 18-series: DS418 and more x18 series to come in 2017 Q4.
  5. New Performance Tuning Section in Control Panel

    • You can prioritize server performance between maximum throughput and stable latency to accommodate application requirements.
    • Applied Models:
      • 18-series : DS218+, DS718+, DS918+, DS3018xs
      • 17-series: DS1517+, DS1817+, DS3617xs, RS3617xs, RS3617RPxs, RS3617xs+, RS4017xs+, RS18017xs+, FS2017, FS3017
      • 16-series : DS216+, DS216+II, DS716+, DS716+II, DS916+, RS2416+, RS2416RP+, RS18016xs+
      • 15-series : DS415+, DS1515+, DS1815+, DS2415+, DS3615xs, RS815+, RS815RP+, RS3415xs+, RC18015xs+
      • 14-series : DS2414+, RS814+, RS814RP+, RS2414+, RS2414RP+, RS3614xs, RS3614RPxs, RS3614xs+
      • 13-series : DS713+, DS1513+, DS1813+, DS2413+, RS3413xs+, RS10613xs+
      • 12-series : DS412+, DS712+, DS1512+, DS1812+, DS3612xs, RS812+, RS812RP+, RS2212+, RS2212RP+,RS3412xs, RS3412RPxs
      • 11-series : DS411+, DS411+II, DS1511+, DS2411+, DS3611xs, RS2211+, RS2211RP+, RS3411xs, RS3411RPxs
  6. Azure AD support

    • Added the capability to join existing Azure AD as an SSO client. Utilizing the single sign-on feature, daily productivity is increased by saving time spent on re-authentication.
  7. Security Advisor

    • Abnormal login’s geolocation and details are dissected through intelligent analysis techniques, followed by DSM notification.
    • Daily and monthly reports provide more comprehensive information, allowing IT administrator to review abnormal activity and security scan regularly.
  8. TLS/SSL Profile Level

    • An advanced way to configure your security level profile based on different services to meet different security level requirements, providing flexibility to suit your network security requirements.
  9. Domain/LDAP management

    • Flexibly assign specified domain group with admin privilege.
  10. FTP

    • Added ECDSA certificate support for FTPS connections.
  11. NFS

    • Added NFS v4.1 multipathing for load balancing and network redundancy to fully support VMware vSphere® 6.5.
    • Applied models:
      • 18-series : DS3018xs, DS418play, DS918+, DS418j, DS418, DS718+, DS218+
      • 17-series : FS3017, FS2017, RS4017xs+, RS3617xs, RS3617RPxs, DS3617xs, RS3617xs+, RS18017xs+, DS1817+, DS1817, DS1517+, DS1517, RS217
      • 16-series : RS2416RP+, RS2416+, RS18016xs+, DS416play, RS816, DS916+, DS416slim, DS416j, DS416, DS216play, DS716+II, DS716+, DS216j, DS216+II, DS216+, DS216, DS116
  12. Package Center

    • A brand new design of user interface brings more intuitive experience and allows users to quickly find everything they need.

What's New in Packages

  1. Presto File Server

    • Supports minimum bandwidth configuration to better predict and control the required file transfer time.
    • Supports MTU discovery, minimizing performance impact over VPN.
    • Enhanced the mechanism resuming transfer task after recovering from network disconnection.
    • Supports verifying SSL connection and displaying the content of SSL certificate.
    • Supports more detailed log events, including task cancellation, network disconnection, successful file transfer, and failed file transfer.
    • Supports double-clicking or right-clicking on a file to download it to the configurable default folder or to a specific folder. Added information of device name, client type, geo-location, and latency to the Overview tab.
  2. Snapshot Replication

    • The following updates are supported on DSM 6.2 only:
      • Support Advanced LUN, a LUN type that creates and restores snapshot within seconds.
      • Snapshot calculator provides a graphical display on snapshot’s storage consumption in a given time, allowing for a more flexible storage control and efficient management.
      • You can now clone or test failover on encrypted shared folders for a more complete protection.
    • This package will support DS418 in mid-October. Users with DS418 may directly download it in Package Center when the package becomes available.
  3. Replication Service

    • A brand new package designed solely for snapshot replication, providing better compatibility with Synology packages.
  4. Docker

    • Upgraded Docker daemon to version 17.05.0-ce, supporting Docker Swarm (DSM 6.2 only) and new official Docker features through command line interface for better container virtualization.
    • Upgraded Docker-compose to version 1.14.0.
    • Supports Overlay network setting with SSH command line (DSM 6.2 is required).
    • Added support for v2 registries and exporting images.
  5. Directory Server

    • Increased password strength by denying users from using passwords that are too common.
    • Increased the number of supported accounts up to 20,000 to meet large-scale deployment needs.
  6. DNS Server

    • When DNS Server is deployed with Active Directory Server, reverse zone management can be done directly in DNS Server.
    • Include log search feature to facilitate users to identify DNS Server issues.
  7. OAuth Service

    • A built-in package providing account authentication and authorization service.
  8. Web Station

    • For a specific PHP version, you can set up multiple PHP profiles and apply these settings to different virtual hosts.
  9. Orthanc

    • Orthanc is a lightweight and standalone DICOM server designed to improve the DICOM flows in hospitals and to support research on the automated analysis of medical images.