At the moment it is possible to map journal and paging directories on different directories via brokerProperties (like below) in broker's CR
~~~
brokerProperties:

• journalDirectory=/opt/amq-broker/data/tomr/journal
• pagingDirectory=/opt/amq-broker/data/tomr/paging
• bindingsDirectory=/opt/amq-broker/data/tomr/bindings
• largeMessagesDirectory=/opt/amq-broker/data/tomr/large-messages
  ~~~
  But it is not possible to mount the above directories on different volumes. The operator should support such feature where for example paging and journal directories could be on different physical volumes. That would help with broker performance since since the IO would be split between two volumes.