How To Fix HH001 - Activate if there is no operating system mirroring

SAP Error Message - Details

• Message type: E = Error

• Message class: HH - (Long) text for check tool 'infcfgcheck'

• Message number: 001

• Message text: Activate if there is no operating system mirroring

What causes this issue?

Mirroring of dbspaces by Informix has been deactivated since the
ONCONFIG parameter 'MIRROR' is set to '0'. This only makes sense for
exceptions when mirroring at operating system level (RAID, ...).

System Response

How to fix this error?

Edit (as user 'informix') the file '$INFORMIXDIR/etc/$ONCONFIG'.
CAUTION: The change will only become active when the database is
started up.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message HH001 - Activate if there is no operating system mirroring ?

  The SAP error message HH001 typically indicates an issue related to the system's high availability configuration, specifically when there is no operating system mirroring in place. This error can occur in environments where SAP is configured for high availability but the necessary underlying infrastructure (like OS mirroring) is not set up correctly.
  Cause:
  
  Lack of OS Mirroring: The primary cause of this error is that the operating system does not have mirroring configured. This is essential for high availability setups to ensure that if one system fails, another can take over without data loss.
  Configuration Issues: There may be misconfigurations in the SAP system or the underlying operating system that prevent it from recognizing the mirroring setup.
  Resource Availability: Insufficient resources or incorrect settings in the cluster or high availability configuration can also lead to this error.
  
  Solution:
  
  Implement OS Mirroring: Ensure that the operating system is configured for mirroring. This typically involves setting up disk mirroring or using a clustered file system that supports high availability.
  Check Configuration: Review the SAP and OS configurations to ensure that they are set up correctly for high availability. This includes checking the cluster settings, failover configurations, and ensuring that all necessary services are running.
  SAP Notes: Check for any relevant SAP Notes or documentation that may provide specific guidance or patches related to this error. SAP frequently updates its knowledge base with solutions for common issues.
  Consult Documentation: Refer to the SAP high availability documentation for your specific version to ensure that all prerequisites and configurations are met.
  Testing: After making changes, conduct thorough testing to ensure that the high availability setup works as expected and that the error does not reoccur.
  
  Related Information:
  
  SAP High Availability: Understanding the principles of high availability in SAP environments is crucial. This includes knowledge of clustering, failover mechanisms, and the role of the operating system in maintaining system uptime.
  System Monitoring: Implement monitoring tools to keep track of system health and performance, which can help in identifying issues before they lead to errors like HH001.
  Backup and Recovery: Ensure that you have a robust backup and recovery strategy in place, as high availability setups can still face issues that require data recovery.
  
  If the problem persists after following these steps, it may be beneficial to engage with SAP support or a qualified SAP consultant who can provide more tailored assistance based on your specific environment and configuration.