I've done a bit more digging around other forums, unfortunately the prognosis doesn't look good.
long story short, there is a known issue with the HPE raid cards and their firmware not playing nice with linux & needing to be updated.
https://community.spiceworks.com/topic/2298518-how-to-fix-hpe-proliant-dl360-firmware-error-err-329-270-333
There was also some discussion on the ubuntu forums about this back in kernel v4 where there was a patch, but i'm not sure if it ended up getting mainlined into upstream linux.
You may have some better luck with ubuntu though