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VDS_E_DRIVER_INVALID_PARAM
VDS_E_DRIVER_INVALID_PARAM is the failure HRESULT 0x8004251C (signed decimal -2147212004, unsigned decimal 2147755292). Its severity bit is set, the facility field is 4 (FACILITY_ITF), and the facility-specific code field is 0x251C.
The volume-management driver rejected its translated request parameters
This code means that the driver returned an invalid-parameter error. The wording matters: it does not necessarily say that the application passed an invalid COM argument. VDS and a provider may validate and transform the caller’s request before constructing the lower-level driver command.
Where the failure boundary lies
Compare this value with E_INVALIDARG or a specific VDS validation error such as an invalid flag, extent size, partition type, or object type. Those normally describe the public API contract. VDS_E_DRIVER_INVALID_PARAM instead reports rejection at the volume-management driver interface.
Likely causes to separate
- Provider state used to construct the driver request is stale, causing a once-valid object or offset to become unacceptable.
- The provider and driver versions disagree about a command structure, flag set, or supported operation form.
- An object property changed between validation and driver submission, invalidating a translated identifier or geometry value.
- A provider defect generated a malformed lower-level request even though the public COM parameters appeared valid.
Evidence worth preserving
- Log the public method and every caller-supplied value before conversion, including sizes, offsets, flags, object IDs, and revision fields.
- Capture the provider identity and versions of the provider, volume-management driver, storage filters, and operating system.
- Record target properties immediately before the call and again after the failure to expose stale geometry or state.
- Preserve driver or VDS events that reveal the internal command or parameter index rejected.
Diagnostic sequence
- Validate the public parameters against the exact method documentation first; do not assume the driver is wrong.
- If public validation passes, reacquire the object and repeat only a non-destructive query to determine whether its geometry or state changed.
- Look for provider/driver version mismatch after servicing, rollback, or vendor package changes.
- Avoid “fixing” the issue by rounding sizes or changing flags without evidence, because that can alter the requested storage layout.
Retry and recovery
Retry after re-enumeration or refresh only when stale state is demonstrated. A consistent rejection with the same translated request is usually not transient; update or repair the provider/driver pair, or change the request according to the documented supported contract. Confirm that no partial operation occurred before resubmission.
What this HRESULT does not establish
This HRESULT does not disclose which internal parameter was invalid and does not automatically blame the application. It also should not be collapsed into VDS_E_DRIVER_INTERNAL_ERROR: one is a rejected command contract, while the other is an unexpected failure inside the driver.
Practical example
An application calculates a volume change from cached extent data. Before submission, another tool changes the layout. The provider converts the old extent information into a driver request, and the driver rejects it with VDS_E_DRIVER_INVALID_PARAM. Reacquiring the object is more appropriate than repeatedly sending the stale command.
Guidance for software and telemetry
Keep pre-translation and post-failure object snapshots in diagnostic builds. Without both views, support cannot distinguish a bad public argument, a stale provider translation, and a binary compatibility defect.
Official Microsoft references
- Microsoft: Virtual Disk Service common return codes
- Microsoft: MS-VDS protocol error codes
- Microsoft: Virtual Disk Service architecture and provider roles
- Microsoft: reenumerating and refreshing VDS objects
- Microsoft: IVdsService::Refresh
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