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NS_I_DISK_REBUILD_FINISHED
NS_I_DISK_REBUILD_FINISHED — 0x400D0057
This result belongs to completed content disk rebuild not to a generic restart checklist, because the server reached the end of its rebuild workflow for the identified disk.
What the status actually records
Rebuild events form a stateful sequence with one owner, an initial disk condition, reconstruction sources, progress, and a terminal result. In the context of completed content disk rebuild, preserve the entire sequence and the pre-rebuild identity data; repeated starts can destroy the evidence that distinguishes source loss from destination failure. Locate the first component changing state in this condition and distinguish later summary errors.
Important boundary. A completion event confirms workflow termination, not automatically the semantic correctness of every reconstructed media object. Record the exact constant and returning API.
Evidence before intervention
| Preserve | Why it matters |
|---|---|
| Matching rebuild-start event and elapsed time | Shows whether the status is expected information, a warning, or the first failure in the event sequence. |
| Final disk state, control-block identifiers, stripe membership, and content count | Ties the message to one server object and one transition instead of a later retry. |
| I/O, checksum, or media errors recorded during the operation | Separates configuration or identity from storage, parser, network, or lifecycle state. |
| Post-rebuild reads of content that previously depended on missing or reconstructed regions | Provides a stable before/after comparison for the proposed correction. |
Preserve the smallest reproducible evidence set and redact client content, credentials, and private network details before sharing it.
A controlled diagnostic path
- Read several representative objects through the normal streaming path. Record the first server event, object state, or return value that changes.
- Restart the Content Server and verify that the disk reopens without another rebuild. Keep media bytes, server identity, and unrelated publishing-point settings fixed.
- Compare the rebuilt inventory with the authoritative catalog or peer inventory. Use a disposable publishing point or maintenance window when the test can alter server or storage state.
Do not use repeated reconnects as the main test; a later success can belong to a new session, publishing-point generation, server owner, completed background operation, or different media path.
How to distinguish nearby outcomes
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.
Correction and acceptance criteria
Correction: If validation fails, preserve the rebuilt volume and investigate source data or metadata consistency instead of immediately rebuilding again. 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 the disk reopens cleanly, inventory agrees with peers, representative content streams correctly, and no repair event recurs. 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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