I purchased a refurbished HP Proliant Server DL560 Gen8 in order to create my own home lab.
The most painful step was to get an Operating System properly working, doesn't matter what was the OS. I tried VMware Esxi, Red Hat, Windows, among others. I spent more than 16 hours researching (even here) and troubleshooting that matter.
The installation was succeeding, but after restarting the server, it was not booting up the OS. Changing the boot sequence or method (UEFI/Legacy) was not the answer, neither using the HP Intelligent Provisioning for installation.