raid5

I think I want to start a raid array level 5.
this is what my google search revealed to me:

If you want to use hardware RAID device, use hot swappable hardware
RAID device with spare disks. If any disk fails, data will be
reconstructed on the first available spare disk without any downtime
and since it is a hot swappable device, you can replace failed device
while server is still running.

Unfortunately, I am finding it difficult to find how to do a hardware
array. Everything I'm finding has to do with software array with a
paragraph about hw array so when I google hardware 'array linux' I get
results and I get confused. Could someone point me to some concise
instructions on doing this? I found one promising one on wiki
(https://raid.wiki.kernel.org/index.php/Hardware_Raid_Setup_using_MegaCli)
but they wanted a raid controller to be installed on your system
first....
Ohhhh .... I think I get it! the hardware raid requires The controller
which is a pci card. So now I need a software array

is that correct?
Any concise instructions?
--
:-)~MIKE~(-:
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