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ERROR_INVALID_MEDIA_POOL
The pool GUID is not valid in the current RSM database
Media pools are logical collections, separate from libraries and physical cartridges. Every cartridge belongs to a pool, and application pools can be nested beneath a hierarchy while system-managed free, import and unrecognized pools have special roles. This error occurs when a pool identifier is stale, belongs to another RSM server, has been deleted, or is confused with a media-type or media-object GUID.
Resolve the pool by current enumeration or by opening it with the intended name and creation policy. Check that the media type of the pool matches the operation and that the caller is not attempting to create or manipulate one of the system pools as if it were an ordinary application pool. Pool permissions should be checked only after identity is confirmed.
What to inspect
- Enumerate NTMS_MEDIA_POOL objects on the same RSM server session.
- Verify the full pool hierarchy and media type.
- Confirm that stored GUIDs were not copied from another server or restored database.
References
- Microsoft: RSM media pools
- Microsoft: creating and opening application media pools
- Microsoft: RSM object types, GUIDs and operational state
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