Error
Error Code: ACFS-07055

Oracle Database Error ACFS-07055: ACFS Extent Data Inconsistency

📦 Oracle Database
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Description

This error indicates that an extent within an ACFS (ASM Cluster File System) file, which the system believes is free or unused, unexpectedly contains non-zero data. It signifies a metadata inconsistency or data corruption within the ACFS, potentially leading to data loss or file system instability. This typically occurs during file system operations, I/O, or after system crashes.
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Error Message

extent[ number ] is not in use but it contains non-zero values:
 _FileOffset: string 
 _Length: string 
 _PhysicalDiskOffset: string 
for file:
 string
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Known Causes

4 known causes
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ACFS Metadata Corruption
The internal metadata of the ASM Cluster File System (ACFS) has become corrupted or out of sync, leading to an extent being marked as free while still containing valid data.
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Underlying Storage Hardware Issues
Problems with the physical disks, storage array, or I/O pathways can cause data corruption, resulting in unexpected values in supposedly free extents.
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Abrupt System Shutdown or Crash
An unexpected power failure or system crash during active file system operations can prevent ACFS from properly flushing metadata changes, leading to inconsistencies.
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Oracle ACFS Software Bug
In rare cases, a bug within the Oracle ACFS software itself could lead to incorrect extent management and the manifestation of this error.
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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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