| Previous | Next |
| VDS_S_DISK_MOUNT_FAILED | VDS_S_ACCESS_PATH_NOT_DELETED |
VDS_S_DISK_DISMOUNT_FAILED
This warning reports a partial disk-level operation in which one or more contained volumes could not be dismounted. IVdsVolumeMF::Dismount documents that a non-forced dismount fails when a volume is in use, and permanent dismount has a different lifecycle from temporary dismount. With multiple volumes on a disk, different volumes can fail for different reasons.
Why this state matters
The warning does not identify the failed volume by itself. Enumerate volumes on the disk and inspect each mount/offline state and active-use evidence. Do not assume that none of the volumes were dismounted: successful members of the set may already have changed state, so a whole-disk retry without reconciliation can act on a mixed configuration.
Diagnostic focus
- List every volume on the disk and requery its current mount/offline state after the warning.
- Identify active users or handles for the specific volumes that remained mounted.
- Distinguish temporary from permanent dismount requests and preserve the original force settings.
- Before retrying the disk-level workflow, reconcile volumes that already completed the dismount step.
Technical references
IVdsVolumeMF::Dismount · IVdsVolumeMF::Mount · IVdsVolumeMF · VDS_VOLUME_PROP · MS-VDS error codes
Looking for a different code? Search another status or error code.