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This is correct - this isn't implicity saying the VM has no control, it's simply saying that it doesn't make sense to run an elevator on virtual devices.

Instead, the I/O is passed straight down the stack to the real disk where there is a single elevator managing all I/O to that disk, whether it comes from different virtual machines, or logical volumes. In your case, this means that the scheduler on the host machine is the one that's being used for that device.