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ERROR_LOG_SECTOR_PARITY_INVALID
A CLFS log sector failed its internal parity check
This state is more specific than a generic read error. CLFS was able to examine a log sector but the sector did not satisfy the integrity information expected for the log block. The check belongs to the CLFS physical format, not to an application checksum embedded in a client data record. It can therefore surface while CLFS scans metadata, restart information, or ordinary log blocks before a higher-level consumer interprets its own payload.
Correlate the error with disk, controller, virtual-disk, and file-system telemetry, but do not assume hardware is the only cause: stale or externally modified log files can also present inconsistent CLFS structures. Preserve the base log and every container as a matched set. If the owner provides a supported reset or recovery path, use it only after identifying whether the log is disposable or contains required recovery information. Copying a sector from another CLFS file is not a valid repair because sector content is tied to the physical log layout.
What to inspect
- Check whether the same storage path reports CRC, bad-block, reset, or surprise-removal events.
- Validate or collect the complete log set rather than inspecting only the client-visible record stream.
- Use the owning service recovery procedure; do not patch CLFS sector bytes manually.
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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