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When migrating the root disk volume, the VM must first be stopped, and users can not access the VM. After migration is complete, the VM can be restarted. Log in to the &PRODUCT; UI as a user or admin. Detach the data disk from the VM. See Detaching and Moving Volumes (but skip the “reattach” step at the end. You will do that after migrating to new storage). Stop the VM. Call the &PRODUCT; API command migrateVirtualMachine with the ID of the VM to migrate and the IDs of a destination host and destination storage pool in the same zone. Watch for the VM status to change to Migrating, then back to Stopped. Restart the VM.