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VDS_E_LUN_DISK_MISSING
This status links two object layers: the hardware-provider LUN and the Windows disk associated with that LUN. The shrink workflow checks the host disk state before allowing the storage subsystem to remove bytes from the end of the logical unit. A missing disk prevents VDS from validating the current host-visible layout safely.
Why this state matters
The condition is different from a LUN being offline. Here the published error refers to the associated disk state. The provider may still know the LUN object, while Windows cannot currently locate or identify the disk object needed to analyze the shrink boundary.
Diagnostic focus
- Resolve the LUN-to-disk association and verify the disk status in the current VDS view.
- Check controller, transport, multipath, and Plug and Play visibility before changing LUN capacity.
- Reenumerate and refresh storage state after the disk becomes visible; do not continue with a stale “missing” disk object reference.
- Only recalculate the shrink boundary after Windows can query the disk layout and associated volumes again.
Technical references
IVdsLun::Shrink · IVdsLun · VDS_DISK_STATUS · VDS_PATH_INFO · MS-VDS error codes
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