Looking into the comment#5 where the specification is to modify the note.In the links mentioned in comment #6 i could see the following information under the section "3.1.2.1.2. Registering a Storage Class" is volumetype It specifies the volume type that is being used. NOTE Distributed-Three-way replication is the only supported volume type.This includes both standard three-way replication volumes and arbiter 2+1. This content modification is correct on the basis of comment#5. Hence moving the bug to verified state .