Our code logic doesn't support images with two verity partitions at the moment, hence refuse this early (with ENOTUNIQ) Also, go even further and refuse any combinations of verity enabled root with verity-less /usr, simplify because that is unsafe and defeats the point of verity. (i.e. we want to give the guarantee that for auto-discovered verity magic we guarantee that the data afterwards available in /usr is safe).
System and Service Manager
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