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STATUS_VIRTDISK_DISK_ALREADY_OWNED
The virtual disk is owned by another component
STATUS_VIRTDISK_DISK_ALREADY_OWNED means ownership has already been established for the target disk. The owner can be a VM, a virtual-disk operation, a storage management component, or another host-side consumer; it is not safe to assume that closing one visible UI window releases every relevant handle or reservation.
This is an exclusion rule. Bypassing it by copying, detaching, or modifying the backing file while the owner is active can turn an ownership conflict into guest file-system damage. Establish the expected owner and its lifecycle before making a maintenance decision.
What to verify
- Correlate the VHD path with VM attachments, active mount state, backup or checkpoint activity, and concurrent storage jobs.
- Collect the requesting process, requested access, and time of the competing operation.
- Release ownership through the component that acquired it; avoid forceful file-level changes while a guest or host operation remains active.
References
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