Beta2, unable to extend pool; camcontrol error

[jenksdrummer]

Error: Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/middlewared/job.py", line 361, in run
await self.future
File "/usr/local/lib/python3.8/site-packages/middlewared/job.py", line 397, in __run_body
rv = await self.method(*([self] + args))
File "/usr/local/lib/python3.8/site-packages/middlewared/schema.py", line 973, in nf
return await f(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/middlewared/plugins/pool_/expand.py", line 97, in expand
await self._resize_disk(part_data, pool['encrypt'], geli_resize)
File "/usr/local/lib/python3.8/site-packages/middlewared/plugins/pool_/expand.py", line 129, in _resize_disk
await run('camcontrol', 'reprobe', part_data['disk'])
File "/usr/local/lib/python3.8/site-packages/middlewared/utils/__init__.py", line 62, in run
cp.check_returncode()
File "/usr/local/lib/python3.8/subprocess.py", line 444, in check_returncode
raise CalledProcessError(self.returncode, self.args, self.stdout,
subprocess.CalledProcessError: Command '('camcontrol', 'reprobe', 'nvd2')' returned non-zero exit status 1.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/middlewared/job.py", line 365, in run
raise handled
middlewared.service_exception.CallError: [EFAULT] Command camcontrol reprobe nvd2 failed (code 1):
camcontrol: cam_lookup_pass: CAMGETPASSTHRU ioctl failed
cam_lookup_pass: No such file or directory
cam_lookup_pass: either the pass driver isn't in your kernel
cam_lookup_pass: or nvd2 doesn't exist


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I have 2x 6-disk Z2 vDev, 1x Mirror SataSSD Metadata vDev, 1x mirror NVMeSSD Dedupe vDev, and am aiming to add 1x single NVMe Cache vDev.

nvd2 is one of the dedupe vdev-disks, it exists/no issues I can see.