Comment 3 for bug 1713239

Blake came out with a good solution, where MAAS would add pseudo/inherited tag based on whether it is a partition or a block device. So all of this would work:

storage=root:(nvme) # would return whatever it finds first
storage=root:(partition, nvme) # would return partitions tagged nvme
storage=root:(blockdev, nvme) # would return block devices tagged nvme.