Your testing results, and suspicion about supportability, are confirmed in the support martix. Unfortunately, OEL8 is not supported in v 1.8 of LUNInfo.
I recommend contacting your sales team to communicate this need so that resources may be prioritized accordingly.
For anyone curious how to check this matrix yourselves:
HPE SPOCK is the website for checking HPE storage compatibility.
https://h20392.www2.hpe.com/portal/swde ... r=3PARinfoTo find the document, login to spock with your free HPE Passport account. Find the "Software" section on the left pane. Choose "Array SW: Primera" or "Array SW: 3PAR" and the large pane on the right will update with a list of all software related support matrices.
https://spock.corp.int.hpe.com/spock/ut ... fo_dsm.pdfHope this helps!