I am trying to make use of an old server. It is a i7-3770k with 32 gb of ram. It has a Perc 5i raid controller and 6 drives. Three 148 GB and three 1 TB. I created a RAID 5 with the three 148 GB drives and then installed Proxmox VE from a USB drive onto it. All went well and I was able to log into the GUI. Then, I ran the update/upgrade and did a reboot. Now it wont boot. It keeps freezing at "Welcome to GRUB". I did a few reboots and a couple times it got past the Welcome to GRUB screen but then hangs at loading RAM disk. I'm not very familiar with the hardware controller and assume that might be my issue. Is there any trick to get this to boot?