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VDS_E_FAILED_TO_OFFLINE_DISK
VDS_E_FAILED_TO_OFFLINE_DISK means IVdsDiskOnline::Offline failed. Mounted or active volumes, open handles, protected roles, provider constraints or device-state changes can prevent the disk from being taken offline.
Quiesce volume use before offlining the disk
- Enumerate volumes and access paths hosted by the disk.
- Dismount relevant volumes according to the documented basic or dynamic disk sequence.
- Re-read disk status and inspect event logs after the failed transition.
For a dynamic read/write online disk, Microsoft documents dismounting each volume before calling Offline, then setting read-only if required. Do not interpret removal of a drive letter as a complete dismount. On shared storage, also confirm cluster or SAN ownership before forcing applications off the disk.
Offline · IVdsDiskOnline · IVdsVolumeMF
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