… detect such tricks, and refuse operation. In systemd we thus started to make more and more use of diskseq, for example via /dev/disk/by-diskseq/ device symlinks, or by referencing block devices via their diskseq numbers whenever possible. This works is incomplete currently, there are gaps at various places (for example, there's no userspace API to query the diskseq number from a mounted file system that is backed by a block device).