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STG_E_DEVICE_UNRESPONSIVE
Storage device is unresponsive during firmware operation
STG_E_DEVICE_UNRESPONSIVE is HRESULT 2147680778 (0x8003020A) from winerror.h. AllStat describes it as “The storage device is unresponsive.” The result belongs to firmware query, download, or activation against a storage device or controller. The symbol this result is useful only when tied to the method and lifecycle phase where the target did not respond within the storage firmware operation contract.
The decisive meaning of this result is that the target did not respond within the storage firmware operation contract. The severity bit does not decide handling; the controlling fact is that the target did not respond within the storage firmware operation contract. A reliable it diagnosis preserves the raw value and reconstructs the state that made this true: the target did not respond within the storage firmware operation contract.
Where the result appears
- This result can surface in a storage firmware query, staged download, activation, device reset, or post-activation verification.
- map the failure to one concrete operation among IOCTL_STORAGE_FIRMWARE_GET_INFO, IOCTL_STORAGE_FIRMWARE_DOWNLOAD, activation state, slot flags, alignment, and maximum transfer size.
- Preserve device instance ID, model, serial or anonymized asset ID, controller path, firmware revision, slot table, image hash, offset, and transfer size before releasing or replacing the object that returned this result.
An incident record for this HRESULT must distinguish caller, runtime, provider, and backing resource while testing whether the target did not respond within the storage firmware operation contract.
Typical causes and interpretation boundary
The immediate contract boundary is specific: the target did not respond within the storage firmware operation contract. Common cause branches include the following:
- The device reset or disappeared from the bus.
- Firmware activation is still in progress.
- The controller, cable, power path, or driver is unhealthy.
Confirm the cause branch that explains why the target did not respond within the storage firmware operation contract by using call arguments, object state, metadata, device information, or provider traces.
Correct handling and recovery
The primary recovery is to stop issuing concurrent commands, rescan the device, collect bus and storage diagnostics, and follow vendor recovery guidance before retry. The result failure report should expose enough firmware query, download, or activation against a storage device or controller state to understand why the target did not respond within the storage firmware operation contract without a production debugger.
The owner of it must define idempotency, cancellation, attempt limits, and reconciliation for the failed firmware query, download, or activation against a storage device or controller. Reconcile persistent, remote, device, or ownership state before repeating it.
Practical scenario
A firmware activation resets an NVMe controller and the immediate follow-up query times out; orchestration waits for re-enumeration instead of redownloading the image. Record the decisive state for this HRESULT and verify recovery on a fresh object or request generation.
Difference from related HRESULTs
ERROR_DEVICE_NOT_CONNECTED indicates absence at a broader API boundary; it is tied to a storage firmware workflow Tests and telemetry should preserve that boundary for this HRESULT.
Developer and administrator guidance
Developers handling it should make object lifetime and state transitions explicit, preserve the native HRESULT, and keep cleanup paths safe when initialization or output is partial. Use vendor-approved test hardware and cover wrong slot, wrong model, interrupted transfer, reset, re-enumeration, and rollback guidance.
Broad permission or compatibility changes are inappropriate unless evidence for the target did not respond within the storage firmware operation contract points to that layer. Repair for this HRESULT should target only the evidence-backed component, provider, document, device, or configuration.
References
- Microsoft: IOCTL_STORAGE_FIRMWARE_GET_INFO
- Microsoft: IOCTL_STORAGE_FIRMWARE_DOWNLOAD
- Microsoft: STORAGE_HW_FIRMWARE_INFO
- Microsoft: STG error codes
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