Error
Error Code: ACFS-07156

Oracle Database Error ACFS-07156: Incorrect ACFS Metadata Offset

📦 Oracle Database
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Description

This error indicates a critical inconsistency within the Oracle ACFS local metadata directory structure. Specifically, the `_map_file_disk_offset` value found in the directory does not match the expected value, suggesting data corruption or an invalid structure for the ACFS file system.
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Error Message

Local_Metadata_Directory structure has incorrect _map_file_disk_offset value
 found: string , but expected to find: string 
for structure:
 string
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Known Causes

4 known causes
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ACFS Metadata Corruption
Unexpected power loss, hardware failure, or software bugs can lead to corruption in the ACFS local metadata directory.
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Software Version Incompatibility
Attempting to use ACFS metadata created with a different, incompatible version or patch level of Oracle Grid Infrastructure.
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Unauthorized Metadata Modification
Direct, unsupported manual changes or accidental overwrites to ACFS internal metadata files or structures.
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Incomplete Restore Operation
Restoring an ACFS file system from a backup that was incomplete or performed incorrectly, leaving the metadata in an inconsistent state.
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Solutions

Coming Soon

Detailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:

General Troubleshooting Tips

  • Check the error message carefully for specific details
  • Review recent changes that might have caused the error
  • Search for the exact error code in the official documentation
  • Check log files for additional context
  • Try restarting the application or service

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