Synology NAS Error Code 47: How to Fix It

Medium 30-60 minutes Medium Severity Verified June 2026
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Error Code
47
Brand
Synology
Product Type
nas
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Error code 47 on your Synology NAS indicates that DSM Snapshot Replication has failed. This typically occurs due to network issues, permission problems, or insufficient storage space. Follow these steps to resolve the error and restore your backup tasks.
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Tools You'll Need

How to Fix Error Code 47

  1. Check Network Connectivity

  2. Verify Snapshot Replication Service Status

  3. Check Storage Space

    Deleting snapshots permanently removes recovery points. Ensure you have backups before proceeding.

  4. Review Replication Task Permissions

  5. Check DSM and Package Updates

    Back up your data before major DSM updates.

  6. Inspect System Logs for Details

  7. Recreate the Replication Task

    Deleting a task removes its schedule but not existing snapshots. You may need to clean up orphaned snapshots manually.
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When to Call a Professional

If you've tried all steps and replication still fails, consider contacting Synology support or a certified IT professional. This is especially recommended if logs indicate hardware issues or if you're not comfortable with network diagnostics.

Frequently Asked Questions

What does Synology error code 47 mean?
Error code 47 means Snapshot Replication failed. This usually happens due to network problems, insufficient storage, or permission errors.
Can I recover data if snapshot replication fails?
Yes, existing snapshots on the source NAS are unaffected. You can still manually take a new snapshot or restore from an older one. Check Snapshot Replication for available recovery points.
Do I need to update DSM to fix error 47?
Not always, but updating DSM and the Snapshot Replication package can resolve known bugs. Always back up before updating.
How do I check if my network is causing replication failure?
Use the Ping tool in DSM's Network Diagnostics to test connectivity to the destination NAS. Also, check that port 5566 (for replication) is open between devices.
Can low disk space on the source NAS cause error 47?
Yes, although it's more common on the destination. Insufficient space on either side can halt replication. Free up space or extend the volume.

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