What does Windows error code 339 (ERROR_FT_DI_SCAN_REQUIRED) mean?

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: Writes are blocked until a data-integrity scan reconciles mirrored or redundant copies.

Could be also:
Constant	Type	OS
KERNEL_LOCK_ENTRY_LEAKED_ON_THREAD_TERMINATION	BugCheck Code	Windows

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ERROR_FT_WRITE_FAILURE	ERROR_INVALID_KERNEL_INFO_VERSION

ERROR_FT_DI_SCAN_REQUIRED

A data-integrity scan is required before writes can resume

ERROR_FT_DI_SCAN_REQUIRED is a Win32 result associated with fault-tolerant or redundant storage.

What the result means

Writes are blocked until a data-integrity scan reconciles mirrored or redundant copies.

What to check

Check storage health and identify which copies are out of sync.
Run the supported data-integrity or repair scan.
Monitor scan progress and review storage event logs for the original fault.
Avoid forcing writes that could make replicas diverge further.

Recommended handling

Keep the volume protected until reconciliation completes. Afterward, verify redundancy and data integrity rather than assuming that write access alone proves recovery.

References

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