What does HRESULT 0x0004244D (VDS_S_IN_PROGRESS) mean?

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The VDS asynchronous operation is still running and has not produced its final operation result.

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VDS_S_VOLUME_COMPRESS_FAILED	VDS_S_IA64_BOOT_MIRRORED_TO_MBR

VDS_S_IN_PROGRESS

VDS_S_IN_PROGRESS is an intermediate asynchronous state. VDS methods that start long operations return an IVdsAsync object; the caller can wait, query progress, or cancel where supported. The eventual operation HRESULT is separate from the COM call status used to inspect the async object, so an “in progress” result must not be logged as the final storage outcome.

Why this state matters

IVdsAsync::QueryStatus returns the operation HRESULT through pHrResult and a percentage value. While the operation is active, progress can be 0 through 99; a zero percentage can also mean that progress cannot be estimated. Correct code keeps the async object alive and observes the final result rather than starting a duplicate operation because a single poll did not show movement.

Diagnostic focus

Keep the original IVdsAsync object and associate it with the storage object and operation that created it.
Record both the status-query call HRESULT and the operation HRESULT returned through the output parameter.
Treat 0 percent as potentially “progress unknown,” not proof that the operation is hung.
Use Wait or continued status queries to obtain the terminal HRESULT before changing topology or retrying.

Technical references

IVdsAsync · IVdsAsync::QueryStatus · IVdsAsync::Wait · VDS_ASYNC_OUTPUT · MS-VDS error codes

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