Synology NAS Error Code: Disk Has Crashed - How to Fix It

Q: Can I recover data from a crashed Synology disk?

If your NAS uses RAID 1, 5, 6, or SHR with redundancy, data should remain accessible after replacing the failed drive. For RAID 0 or single drives, professional data recovery services may be required.

Q: How do I know which drive crashed in my Synology NAS?

Check DSM Storage Manager under Storage > HDD/SSD. Failed drives will show critical status, red indicators, or error messages. The physical drive bay typically has an LED indicator showing the problem.

Q: What causes Synology NAS drives to crash?

Common causes include drive age (typically 3-5 years), manufacturing defects, power surges, overheating, excessive vibration, or normal wear from continuous operation. Regular SMART monitoring can predict many failures.

Q: Do I need the exact same drive model for replacement?

No, you need the same interface (SATA) and form factor (3.5" or 2.5"), but the replacement drive should be equal or larger capacity. Different brands and models are generally compatible.

Q: How long does a Synology RAID rebuild take?

Rebuild time depends on drive size and RAID type. Expect 6-12 hours for drives up to 4TB, and 12-24+ hours for larger drives. The process runs automatically but avoid heavy NAS usage during rebuild.

Abstract

The 'Disk has crashed' error on your Synology NAS indicates a hard drive has experienced critical SMART failures or read errors and needs immediate replacement. This is a serious issue that could lead to data loss if not addressed quickly.