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VDS_E_VOLUME_SYNCHRONIZING
Synchronization is a transition state of redundant storage, not a generic busy flag. VDS models mirrored and RAID-5 volumes as fault-tolerant types, and the volume object exposes status, health, and transition state separately. While data consistency is being established across redundant members, operations that change the volume topology can be blocked with this HRESULT.
Why this state matters
Query the volume and all plexes instead of polling by repeating the rejected operation. Record transition state and health, then wait for the synchronization workflow to reach a stable result. If progress stops, inspect the contributing disks for I/O failures or missing members. Removing a plex or forcing another layout change during synchronization can destroy the redundancy state that VDS is trying to establish.
Diagnostic focus
- Capture volume status, health, and transition state from current properties.
- Enumerate plexes and identify which redundant copy or parity layout is not yet synchronized.
- Check all contributing disks for missing, failed, or unstable I/O conditions.
- Retry the blocked topology operation only after the volume reaches a stable transition state.
Technical references
MS-VDS error codes · VDS_VOLUME_PROP · VDS_VOLUME_STATUS · VDS Volume Object · VDS_VOLUME_PLEX_PROP
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