What does HRESULT 0x8004232A (VSS_E_UNSELECTED_VOLUME) mean?

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Description:

The requested operation would overwrite a volume that is not explicitly selected. For more information, check the Application event log.

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VSS_E_TRANSACTION_THAW_TIMEOUT	VSS_E_SNAPSHOT_NOT_IN_SET

VSS_E_UNSELECTED_VOLUME

VSS_E_UNSELECTED_VOLUME The requested operation would overwrite a volume that was not explicitly selected. VSS blocks this to prevent an unintended restore from modifying unrelated data.

What to check

Review the volume-selection list in the backup or restore job and compare it with the volumes contained in the snapshot set.
Include every volume that the operation is designed to overwrite, especially when applications use mount points or multi-volume components.
Do not bypass the selection safeguard; correct the restore plan and validate it in a test environment when possible.

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Microsoft: Volume Shadow Copy Service

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