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E_IMAPI_RECORDER_MEDIA_BECOMING_READY
Optical devices can need time after tray close, media insertion, spin-up, or another state transition before commands are accepted. E_IMAPI_RECORDER_MEDIA_BECOMING_READY is a transient readiness result and Microsoft explicitly recommends trying the request again later.
Retry with delay and a bounded readiness policy
- Record when the media change occurred and how long readiness has been pending.
- Use delayed retries rather than a tight command loop that repeatedly hits the drive.
- Escalate when the state persists or changes to timeout/invalid-response results.
The code is not permission failure and does not prove the medium is incompatible. After the drive becomes ready, re-run the format-specific support check because readiness alone does not guarantee the current media supports the intended operation. A retry policy should have an upper bound and preserve the final device HRESULT.
IMAPI return values · Checking media support · IDiscRecorder2
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