HRESULT 0x800423F9 (VSS_E_MISSING_HIDDEN

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Description:

An expected hidden volume did not arrive in the system. Check the Application event log for more information.

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VSS_E_MISSING_DISK	VSS_E_MISSING_VOLUME

VSS_E_MISSING_HIDDEN_VOLUME

VSS_E_MISSING_HIDDEN_VOLUME A hidden volume that VSS expected was not found. Hidden system, recovery, or provider-managed volumes can be required even when they are not exposed as drive letters.

What to check

Review disk and partition layout with administrative storage tools and compare it with the backup or snapshot metadata.
Check Application events for the missing-volume details that accompany this HRESULT.
Do not recreate or expose hidden partitions casually; first determine their original role and whether the restore target matches the source layout.

diskpart

list volume

Microsoft: VSS documentation portal

Microsoft: Volume Shadow Copy Service

Microsoft: VSS requesters

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