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

Last Updated:

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


  • The mSATA drive, used for flushing cache in the events of power down or sudden loss of power has failed.
    • Depending on the system configuration, there will possibly be an alert indicating 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"


Storage Array Profile shows cache backup device is failed.


Cache Backup Device
   Status:                    Failed
   Type:                      SATA flash drive
   Location:                  Controller B, Connector SATA 2
   Capacity:                  8,192 MB
   Product ID:                SV9MST6D030GLM22
   Part number:               Not Available
   Serial number:             SPG19020KXS
   Revision level:            FW11
   Manufacturer:              XceedLi
   Date of manufacture:       Not available


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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