What does HRESULT 0x80042321 (VSS_E_SOME_SNAPSHOTS_NOT_IMPORTED) mean?

Status / error code:

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Constant name:

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Description:

Some shadow copies were not successfully imported.

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VSS_E_NO_SNAPSHOTS_IMPORTED	VSS_E_MAXIMUM_NUMBER_OF_REMOTE_MACHINES_REACHED

VSS_E_SOME_SNAPSHOTS_NOT_IMPORTED

VSS_E_SOME_SNAPSHOTS_NOT_IMPORTED VSS imported only part of a requested shadow-copy set. Treat this as a consistency warning: a partial set may not contain every volume required by the application or restore workflow.

What to check

Identify the exact snapshots that were not imported and map them to the source volumes and writer components.
Confirm that every required disk, LUN, and mount point is visible to the target host.
Validate the imported set before using it for recovery; a partial import can be unsuitable for an application-consistent restore.

vssadmin list shadows

Microsoft: Volume Shadow Copy Service

Microsoft: VSS requesters

Microsoft: vssadmin list shadows

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