We currently do not monitor RAID status for HP servers. Seeing how we have a lot of HP servers nowadays, we're running blind and this is a major problem.
HP ships .debs in a their apt with their monitoring tools (hpssacli, previously known as hpacucli). We'll need to import that into our repository (with reprepro updates) and add an Icinga check to use it.
We could either adjust check-raid.py to handle it (also see T84050) or use a separate plugin. Debian's DSA team has a monitoring/nagios check for hpcacucli that was pretty good last time I tried it; we could potentially use that.