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E-Series Persistent cache backup device has failed - AutoSupport Message

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Applies to

NetApp E-Series

Event Summary

  • Persistent cache backup device has failed is reported in the events log on SANtricity
  • CACHE BACKUP DEVICE - Failed error message is showing in the Recovery Guru.
    • Additionally, a  CACHE_BACKUP_DEVICE_INSUFFICIENT_CAPACITY recovery guru failure entry may be logged.

E-Series Persistent cache backup device has failed

  • The mSATA drive, used for flushing cache in the event of a power down or sudden loss of power, has failed.
    • Depending on the system configuration, an alert may be displayed indicating that the cache is disabled or suspended. This is to be expected if the cache backup device fails.
      • Failure Entry 2: WB_CACHING_FORCIBLY_DISABLED-Recovery Failure Type Code: 378

Validate

  • The Storage Array Profile log indicates that the cache backup device has failed.
  • Example:

Cache Backup Device                                           
            Status:                    Failed                          
            Type:                      SATA flash drive                
            Location:                  Controller A, Connector SATA 1  
            Capacity:                  8,192 MB                        
            Wear Life Used:            0%                              
            Endurance Remaining:       100%                            
            P/E Cycles:                15                              
            Product ID:                ATP SATA III mSA                
            Part number:               Not Available                   
            Serial number:             210703540063                    
            Revision level:            R082                            
            Manufacturer:              ATP                             
            Date of manufacture:       Not available    

Resolution

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.

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