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ERROR_LOG_SECTOR_INVALID
CLFS rejected the physical sector structure
CLFS stores log records in physical containers and interprets those files as sector-aligned log blocks rather than as an arbitrary byte stream. The CLFS APIs expose LSN block offsets and container identifiers, while the log implementation validates on-disk structures before treating sectors as part of the active physical log. An invalid sector therefore points below the client record format: the log service could not accept a physical sector as structurally usable log storage.
Diagnose the base log and its containers as one physical-log set. Identify the owning component before replacing files, because applications such as transactional resource managers depend on CLFS recovery state. Compare the failure with storage and file-system events, verify that all expected container files belong to the same log, and use CLFS validation or the application-specific recovery procedure. Recreating only one container can make the remaining metadata and physical extent map less coherent, not more.
What to inspect
- Map the failing .blf and container set to the application or Windows component that owns the log.
- Check storage, NTFS, and device events for I/O or corruption at the same time as the CLFS failure.
- Preserve the complete physical log before repair so metadata and containers can be examined together.
References
- Microsoft: CLFS base log files, containers, dedicated and multiplexed logs
- Microsoft: clfsw32 API reference
- Microsoft: CLFS archive mode, archive tail, and physical-log archive contexts
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