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E-Series Controller is in Analysis Lockdown Mode due to excessive Data Assurance errors - AutoSupport Message

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Applies to

  • NetApp E-Series
  • NetApp StorageGRID Appliances

Event Summary

  • E-Series controller has entered a lock down state because it detected an excessive number of Data Assurance (DA) errors. The controller lock down aims to prevent further data corruption.
  • DA feature implements the T10 Protection Information (PI) standard, ensuring data integrity by detecting and correcting errors during data transfer along the I/O path. It adds cyclic redundancy checks (CRCs) to each data block in DA-enabled volumes, verifying data integrity during transmission and preventing corrupted data from being written to disk or returned to the host.

Validate

When logging into SANtricity System Manager, the login page is unavailable. Instead, a warning is displayed indicating the controller is in "Data Assurance Analysis Lockdown".

Resolution

A full system diagnostics is necessary to determine the underlying cause of DA errors. Recovery steps may include hardware replacements and software upgrades.

Please contact NetApp Technical Support or log into the NetApp Support Site to create a technical case. Reference this article for further assistance.

Additional Information

What is Data Assurance?

 

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.