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VDS_E_LUN_DISK_NOT_READY
VDS_E_LUN_DISK_NOT_READY means the host disk corresponding to the LUN has VDS_DS_NOT_READY status. The device may be spinning up, transitioning power state, completing discovery, or waiting for a storage path to become usable.
Wait for a stable device state
- Monitor disk notifications and re-read status instead of immediately resubmitting shrink.
- Verify all active controller and multipath routes to the LUN.
- Distinguish temporary not-ready state from failed or offline state in diagnostics.
The correct response is not to shrink only the array object while Windows still sees an unstable disk. The host partition and filesystem must remain coordinated with the final LUN size. Use provider refresh after the device is ready, then recalculate the requested shrink against current properties.
LUN shrink · Disk status · LUN notifications
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