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NS_I_START_DISK
NS_I_START_DISK — 0x400D005A
A productive reading of administrator-requested disk start begins at the component boundary where a NetShow administrator explicitly requested that a configured content disk be brought online.
Operational meaning
Administrative information messages record who requested a transition and which object was targeted. In the context of administrator-requested disk start, they do not guarantee that the requested start, stop, rebuild, or removal completed, so the follow-up object-state event is essential. Locate the first component changing state in this condition and distinguish later summary errors.
Important boundary. This message records the control action, not the successful completion of disk initialization. Record the exact constant and returning API.
Facts worth preserving
| Preserve | Why it matters |
|---|---|
| Administrator network location, target disk identity, request timestamp, and authorization context | Separates configuration or identity from storage, parser, network, or lifecycle state. |
| Disk state before the request and the follow-up start, failure, or rebuild event | Provides a stable before/after comparison for the proposed correction. |
| Server mapping for the disk and any maintenance lock | Shows whether the status is expected information, a warning, or the first failure in the event sequence. |
| Reason recorded in change control or automation logs | Ties the message to one server object and one transition instead of a later retry. |
Collect enough to identify the attempt without copying private media or secrets; hashes, object IDs, timestamps, and configuration exports are normally sufficient.
Reproduce the boundary safely
- Issue the start from one supported administration path and correlate the resulting disk event. Retain a known-good stream, session, or server object so a broad restart is not mistaken for repair of the reported failure.
- Compare a healthy offline disk with a disk held by rebuild or failure state. Record the first server event, object state, or return value that changes.
- Verify that the same identity cannot start an unassigned disk. Keep media bytes, server identity, and unrelated publishing-point settings fixed.
Retry only after one controlled server, object, route, storage, or input condition changed; an uncontrolled service restart creates a new execution context and is not proof that the original condition was transient.
What not to infer
When a minimal control succeeds, the failure is tied to the original object or its state rather than to the whole Windows subsystem. When the control fails identically, preserve host-level evidence first. If a different code appears, that is a moved boundary, not automatic success.
Also check severity: informational and warning values are observations or policy notifications and should be routed differently from a failure HRESULT even when an event viewer labels the source generically.
Closing the incident
Correction: Resolve any state or metadata error reported after the request; do not treat repeated start commands as repair. Keep the original server configuration, event sequence, object inventory, input hash, and topology snapshot so the change can be reversed and explained.
Accept the repair only when one authorized request produces a disk-running event for the intended object and the disk serves content afterward. Repeat the original supported operation under the original identity and object state; a simplified media file, replacement server, new session, or different client is useful comparison evidence but not final regression proof.
Technical references
Use these Microsoft references for the formal contract and combine them with the exact server or catalog evidence from the incident: Check version-specific behavior against the Windows Media Services and SDK generation that produced the event.
- Microsoft Open Specifications: HRESULT values — defines the formal status or component boundary.
- Microsoft: Windows Media Services 9 Series SDK — documents the relevant API or lifecycle.
- Microsoft: Windows Media Services SDK architecture — provides the architecture, format, or protocol context.
- Microsoft: programming the Windows Media server object model — supports the controlled verification criteria.
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