Error
Error Code: ACFS-07048

Oracle Database Error ACFS-07048: Invalid Metadata Generation Number

📦 Oracle Database
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Description

This error indicates a severe inconsistency or corruption within the Oracle ACFS (Automatic Storage Management Cluster File System) metadata. It specifically points to an invalid generation number for a metadata structure, meaning the file system's internal state is out of sync or damaged. This typically occurs after unexpected system shutdowns, storage failures, or incorrect ACFS management operations.
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Error Message

metadata structure has invalid _generation_number value
 found: number , but expected to find: number 
for structure:
 string
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Known Causes

3 known causes
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ACFS Metadata Corruption
Unexpected power failures, hardware issues, or improper system shutdowns can lead to corruption of the ACFS metadata files.
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Improper ACFS Operations
Incorrectly unmounting ACFS file systems, performing unsupported snapshot operations, or manual modifications can damage metadata integrity.
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Underlying Storage System Issues
Problems with the physical disks, storage array, or network connectivity hosting the ACFS volumes can cause data and metadata inconsistencies.
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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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