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E-Series Insufficient cache backup device capacity - AutoSupport Message

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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

  • For E2800, E5700 and E4000 controllers, The device may have been failed prematurely due to frequent health check events and it is recommended to attempt the steps in the Partner Notes section before hardware replacement.

  • 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

 

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.