This fails in my zoned device tests with; mkfs.xfs: error - cannot set blocksize 512 on block device /dev/nvme3n1: Invalid argument that error turns to be because the scratch rtdev /dev/nvme3n1 has a 4k LBA size, while the main scratch device has a 512 byte sector size, which is a configuration common for but not exclusive to zoned device, and which means that we can't use a 512 byte block size for the file system. I'm not really sure how to best add the case of a larger LBA size on the rt device to this test, though.
