Dell PERC H750 megacli hangs in Ubuntu 20.04 LTS
Solution 1:
After research I've discovered that the hwraid.le-vert.net packages are not up to date and were causing the kernel panic. After removing them and installing the zip from LSI directly using alien the commands work fine.
https://gist.github.com/fxkraus/595ab82e07cd6f8e057d31bc0bc5e779