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Avoiding DSM 7 Migration Pitfalls

What Can Go Wrong with DSM 7 Migration and How to Fix It

One of the biggest changes in Synology’s recent history is the move to DSM 7. The platform added better security, a more modern package architecture, better Active Insight monitoring, and stricter controls over applications. But a lot of users found that upgrading isn’t always as easy as clicking “Install.”

DSM 7 migrations can cause problems you didn’t expect, like package incompatibility and permission errors. Knowing what can go wrong helps keep data safe and downtime to a minimum.

1. Packages that don’t work together after an upgrade

Finding out that some third-party or legacy packages don’t work anymore after an upgrade is one of the most common problems.

The DSM 7 update added:

  • More strict application sandboxing
  • New security frameworks
  • Some older APIs are no longer supported

Older backup tools, custom scripts, or community packages may not start up.

How to make it better:

  • Check to see if the package is compatible before upgrading
  • Look at Synology’s official guide to moving
  • Use supported alternatives instead of old apps that are no longer supported
  • When you can, test upgrades in systems that aren’t in production

2. Problems with permissions and shared folders

DSM 7 made big changes to how permissions are handled, especially for service accounts and internal users of the system.

After migration, administrators frequently face:

  • Applications can’t get to shared folders anymore
  • Backup jobs fail because permission is denied
  • Docker containers can’t write data

This happens because DSM 7 made internal service privileges stricter.

How to make it better:

  • Check the permissions for the shared folder again.
  • Give new internal users access to the system
  • Check that service accounts are correctly mapped.
  • Check the paths of Docker volumes

3. Conflicts between Active Backup and Hyper Backup

After an upgrade, backup systems may work differently. Some users have:

  • Interruptions in backup tasks
  • Policies that don’t work for retention
  • Restores acting in ways that weren’t expected

This is usually the result of changes to the DSM 7 security architecture’s settings.

How to fix it:

  • Check backup destinations again.
  • Check the keys and credentials for encryption.
  • After migration, test a restore right away.
  • Check backup logs for changes to policies.

Always check to make sure that backup jobs are still running well.

4. Problems with LDAP and Domain Join

After an upgrade, businesses that use Active Directory or LDAP may have trouble with authentication.

Some of the signs are:

  • Failed attempts to log in to a domain
  • Group permissions are not working
  • Warnings about the LDAP service

DSM 7 changed how authentication works and what certificates are needed.

How to make it better:

  • Check the DNS settings
  • Check again that the domain controller is connected
  • Put the certificate trust settings back in place
  • Start over with directory services

5. Changes in how Docker and Containers work

DSM 7 changed the security models for managing containers. Some containers that used to work fine may now break.

Some common reasons are:

  • Limitations on privileges
  • Resetting network settings
  • Conflicts over volume permissions

How to make it work:

  • Change the permissions on the container
  • Make new custom Docker networks
  • Don’t run containers as root
  • Put resource limits back in place

Testing containers in staging environments lowers the risk of problems in production.

6. After moving, it works slowly

After upgrading, some users say that indexing is slower or that the service starts up later.

This happens a lot because DSM 7 rebuilds the databases on the system and reindexes the media.

How to make it better:

  • Let background tasks finish
  • Keep an eye on CPU and disk use
  • Check the settings for the SSD cache
  • Reboot when the indexing is done

Most of the time, performance returns to normal once background processes are done.

Improvements in DSM 7 for Synology

Even though moving to DSM 7 is hard, it brings real improvements. Improved snapshot immutability keeps ransomware at bay. Active Insight lets you keep an eye on things in the cloud. Security Advisor can now scan for vulnerabilities in more depth.

When set up correctly, DSM 7 greatly improves the integrity of storage and the ability to manage it compared to older versions.

About Epis Technology

Instead of reacting to changes, Epis Technology helps businesses plan DSM 7 upgrades ahead of time. The team checks that packages are compatible, that backups are safe, that domains are integrated, and that Docker and virtualization workloads stay stable. They also make sure that DSM upgrades work with Microsoft 365 backup, hybrid cloud replication, and business continuity planning. With structured validation and monitoring, migrations turn into planned changes instead of emergency recoveries.

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