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E-Series Insufficient cache backup device capacity - AutoSupport Message

  1. Last updated
    May 22, 2025
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Last Updated:
5/22/2025, 7:38:49 AM

Applies to

  • NetApp E-Series
  • NetApp StorageGRID Appliances

Event Summary

  • E-Series insufficient cache backup device capacity indicates the controller onboard mSATA backup device has likely failed a Diagnostic test causing the backup capacity to be insufficient.
  • All volumes will change to write-through caching whenever the usable capacity of the persistent cache backup device is less than that of the cache memory. 
    • This will generate a recovery failure entry stating that there is insufficient cache backup device capacity.
    • Volumes configured to allow write caching without batteries will be unaffected.

Validate

  1. Open SANtricity System Manager and review the list of recovery guru failure entries under the home page. 
  2. In SANtricity System Manager, the cache backup device status can be checked under the Hardware section or under Storage Array Profile in Support "Support Resources" section.

Cache Backup Device                                                          
   Status:                                   Failed                          
   Type:                                     SATA flash drive                
   Location:                                 Controller A, Connector SATA 1  
   Capacity:                                 8,192 MB                        
   Product ID:                               SH9MCR3D016GJS02                
   Part number:                              Not Available                   
   Serial number:                            SPG164XXXXX                     
   Revision level:                           FW10                            
   Manufacturer:                             XceedLi  

  1. The system event log under Support > Events reports a critical "Insufficient cache backup device capacity" event.

Resolution

  • E-Series controller cache backup device is not a field replaceable unit. The controller with failed device must be replaced.

  • The solution might require a part replacement. Please contact NetApp Technical Support or log into the NetApp Support Site to create a case. Reference this article for further assistance.

Additional Information

What is a persistent cache backup device failure?

 

 

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