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STATUS_VIRTDISK_DISK_ONLINE_AND_WRITABLE
The operation refuses a writable online disk
STATUS_VIRTDISK_DISK_ONLINE_AND_WRITABLE is a safety precondition. The operation requires the virtual disk to be offline or read-only, because it must not race normal write I/O, mounted volumes, or another component that can change metadata while maintenance is in progress.
Do not interpret this as permission to take an arbitrary production disk offline. First identify every mounted volume and every VM or storage workflow using the disk. A supported maintenance window and a known recovery path are more important than making the immediate API call succeed.
What to verify
- Confirm the disk and volume state at the host and guest layers, including mount points and VM attachments.
- Use the documented read-only or offline state required by the specific operation rather than relying on an application-level lock.
- Verify that no checkpoint, merge, backup, or replication operation is changing the same backing image before retrying.
References
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