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Install RHEL 7 on old HP DL380 g5

Someone at work had been running RHEL on an HP DL380 G5 and blew it up.  After several attempts at doing an installation that made me conclude the hardware was actually bad... I kept digging for the answer.

Attempt install and Anaconda could not find any disks
- try a Drivers Disk (dd.img) both cciss and hpsa.
  -- once we did that, when the system would reboot it would say it could not find a disk. hmmm.


Boot from your installation media and interrupt the startup at grub.

Add
hpsa.hpsa_allow_any=1 hpsa.hpsa_simple_mode=1
to the line starting with linuxefi
press CTRL-X to boot.

Once the system restarts after the install, you need to once again interrupt the startup and add the line from above.

After the system starts, edit /etc/default/grub and add those 2 parameters to the end of the line starting with GRUB_CMDLINE_LINUX (which likely has quiet at the end of the line currently).

then run
# cp /boot/grub2/grub.cfg /boot/grub2/grub.cfg.orig
# grub2-mkconfig -o /boot/grub2/grub.cfg
# reboot

Other folks might suggest to boot to rescue, chroot /mnt/sysimage... edit the file... run grub2-mkconfig and relabel the filesystem...  which will also work.  I just think my way is
a.)  easier
b.)  quicker
3.)  works
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