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ERROR_LOG_BLOCK_VERSION
The log block version is incompatible with current CLFS processing
CLFS validates physical log blocks before exposing client records. A block-version failure is narrower than generic metadata corruption: a version field in the CLFS block format is not acceptable to the implementation reading the log. The client record schema is not involved at this stage, so changing an application serializer or record payload does not address the failure.
Check how the base log and containers arrived on the current machine. Image rollback, copying CLFS files between systems, partial restore, or replacing one file in the set can leave a physical format that does not match the reader or the rest of the log. Treat the log as an opaque CLFS structure. If portability or archival is required, use the owner-supported backup or CLFS archive workflow rather than copying a live .blf and selected containers. Preserve evidence before allowing the owner to recreate a disposable log.
What to inspect
- Correlate the failure with OS rollback, image restore, or manual copying of CLFS files.
- Verify that the .blf and containers came from the same snapshot and physical log.
- Do not rewrite block-version fields; recover or recreate the log through the owning component.
References
- Microsoft: CLFS base log files, containers, dedicated and multiplexed logs
- Microsoft: CLFS archive mode, archive tail, and physical-log archive contexts
- Microsoft: clfsw32 API reference
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