Data Domain: STORAGE-00009 | RAID Protection in Critical State

Summary: Data Domain systems initiate a graceful shutdown if multiple disk failures occur and RAID reconstruction cannot proceed. This protective measure prevents potential data loss when RAID protection reaches a critical state. ...

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
Check out other resources

Symptoms

  • Event Code: STORAGE-00009
  • Alert Message: 
    Two or more disks are failed and the RAID protection is in critical state for over a considerable period of time. 
If an additional disk fails, there might be permanent loss of data. The system will shut down.
  • RAID6 disk group degraded by two failed disks
  • No spare disks available for reconstruction
  • RAID reconstruction stalled or not progressing
  • System initiates shutdown to protect data integrity

Cause

The Data Domain Operating System (DDOS) continuously monitors disk health and RAID status. If two or more disks fail and:

  • No spare disks are available for reconstruction, or
  • RAID reconstruction fails to progress over time,

Then DDOS triggers a system shutdown to prevent further degradation and potential data loss.

Resolution

To prevent this condition:

  • Replace failed disks promptly. Replaced disks become available spares for future reconstruction.
  • Do not allow failed disks to accumulate in the system.

If multiple disk failures occur simultaneously:

  • Contact your Data Domain Service/Support Provider immediately for assistance.





 

Affected Products

Data Domain, Data Domain, PowerProtect Data Protection Hardware

Products

Data Domain Deduplication Storage Systems, Integrated Data Protection Appliance Family
Article Properties
Article Number: 000203752
Article Type: Solution
Last Modified: 30 Oct 2025
Version:  5
Find answers to your questions from other Dell users
Support Services
Check if your device is covered by Support Services.