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NS_E_CANNOTONLINEDISK
NS_E_CANNOTONLINEDISK: Content Server disk state
NS_E_CANNOTONLINEDISK (0xC00D000A) means Windows Media Services could not bring the selected Content Server disk online.
Evidence to preserve
Record the disk UID, stored layout and membership metadata, current rebuild or mirror state, device visibility, and the first storage-management error returned while bringing it online.
How to interpret it
This is an online-transition failure, not proof that the whole Content Server is unavailable. Identity or layout inconsistency can block the transition even when the device is physically visible.
Recovery and verification
Correct the member-state, UID, or lower-level storage problem indicated by the evidence, then repeat the online request and confirm the disk appears in the expected current layout.
Technical references
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