What does HRESULT 0x80042573 (VDS_E_SHRINK_SIZE_LESS_THAN_MIN) mean?

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the requested shrink result is below the minimum amount required by the call.

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VDS_E_PROVIDER_INTERNAL_ERROR	VDS_E_SHRINK_SIZE_TOO_BIG

VDS_E_SHRINK_SIZE_LESS_THAN_MIN

VDS_E_SHRINK_SIZE_LESS_THAN_MIN means the reclaimable amount does not satisfy the minimum shrink parameter. The extended shrink API accepts desired and minimum reclaimable byte counts and rounds them to filesystem cluster boundaries.

Compare requested and actually reclaimable bytes

Call QueryMaxReclaimableBytes as an estimate before shrinking.
Log desired and minimum values after cluster-size rounding.
Choose a lower minimum or free/move data when the operation cannot meet the contract.

The maximum estimate can exceed what is available at execution time because immovable files and transient placement matter. Therefore a previously acceptable minimum can still fail later. This error is not fixed by requesting a larger desired value while leaving an impossible minimum unchanged.

Shrink · QueryMaxReclaimableBytes · IVdsVolume::Shrink

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