Synology NAS System Partition Failed Error: How to Fix It

Medium 2-6 hours (depending on repair time) High Severity Verified June 2026
Error Code
System partition failed
Brand
Synology
Product Type
nas
Severity
High
DIY Difficulty
Medium
Estimated Fix Time
2-6 hours (depending on repair time)
The Synology system partition failed error occurs when the DSM (DiskStation Manager) system partition becomes corrupted on one of your drives. This critical error can prevent your NAS from booting properly or accessing data, but can typically be repaired using the built-in Storage Manager tools.
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Tools You'll Need

How to Fix Error Code System partition failed

  1. Power down and check connections

    Always power down the NAS completely before removing or reseating drives to prevent data corruption.
  2. Power on and access DSM

  3. Open Storage Manager

  4. Check storage pool health

  5. Repair system partition

    The repair process may take several hours depending on drive size. Do not power off the NAS during this process.
  6. Monitor repair progress

  7. Verify repair completion

  8. Update DSM and packages

Parts You May Need

Replacement hard drive or SSD
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Uninterruptible Power Supply (UPS)
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Replacement hard drive or SSD
Check Price on Amazon
Uninterruptible Power Supply (UPS)
Check Price on Amazon
Replacement hard drive or SSD
Check Price on Amazon
Uninterruptible Power Supply (UPS)
Check Price on Amazon
Replacement hard drive or SSD
Check Price on Amazon
Uninterruptible Power Supply (UPS)
Check Price on Amazon
Replacement hard drive or SSD
Check Price on Amazon
Uninterruptible Power Supply (UPS)
Check Price on Amazon
Replacement hard drive or SSD
Check Price on Amazon
Uninterruptible Power Supply (UPS)
Check Price on Amazon
Replacement hard drive or SSD
Check Price on Amazon
Uninterruptible Power Supply (UPS)
Check Price on Amazon
Replacement hard drive or SSD
Check Price on Amazon
Uninterruptible Power Supply (UPS)
Check Price on Amazon
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When to Call a Professional

Contact Synology support or a data recovery specialist if the automatic repair fails, multiple drives show system partition errors simultaneously, or if you hear unusual clicking or grinding noises from the drives indicating potential hardware failure.

Frequently Asked Questions

What causes Synology system partition failure?
System partition failure typically occurs due to sudden power loss, drive age, bad sectors on the drive, improper shutdown, or firmware corruption. Regular UPS usage and proper shutdown procedures help prevent this issue.
Will I lose data if the system partition repair fails?
The system partition repair process typically doesn't affect user data, as it only repairs the DSM system files. However, if the repair fails completely, you may need professional data recovery services to retrieve your files.
How long does system partition repair take on Synology NAS?
Repair time varies from 30 minutes to 12+ hours depending on drive size and damage extent. A 4TB drive typically takes 2-4 hours, while larger drives or severely corrupted partitions may take much longer.
Can I use my NAS while system partition repair is running?
Yes, you can access most NAS functions during repair, but performance will be significantly reduced. Avoid intensive operations like large file transfers or running multiple applications simultaneously during the repair process.
Should I replace the drive after system partition repair?
If repair succeeds and SMART tests show the drive is healthy, you can continue using it. However, if system partition failures occur repeatedly on the same drive, consider replacing it as it may indicate impending drive failure.