NTSTATUS 0xC01A0004 (STATUS_LOG_BLOCK

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Description:

a CLFS log I/O block on stable storage is only partially available.

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STATUS_LOG_SECTOR_REMAPPED	STATUS_LOG_INVALID_RANGE

STATUS_LOG_BLOCK_INCOMPLETE

STATUS_LOG_BLOCK_INCOMPLETE means CLFS reached a log I/O block that is partial rather than a complete block ready for record processing. A CLFS record is stored inside a log I/O block, so a partial block is not safely equivalent to a shorter application record.

This differs from STATUS_LOG_BLOCK_INVALID, where a complete block fails validation, and from STATUS_LOG_SECTOR_PARITY_INVALID, which identifies a sector parity failure. The status does not identify the event that made the block partial, so storage, crash, and restore evidence must be considered separately.

Diagnose the write boundary

Identify the last LSN that the writer forced or flushed to stable storage, if application or CLFS diagnostics retain it.
Preserve the entire base file and container sequence before retrying writes that could advance the active log.
Use a CLFS-aware validation or restore process; do not treat the remaining bytes as an ordinary truncated document.

References

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