just my 2 cents, if youre going to do raid, buy a thing that will do it...
a nas or enclosure where the hardware does all the heavy lifting.
do not build raided system from a bunch of disks... i have had, and have had friends have many failures over the years from those home brew raids failing in one way or another and its usually the software that causes the raid to go sideways.. mayvbe shits better today than it was 10-20 years ago.
its just off my list. i bought a bunch of cheap nas devices that handle the raid, and then i mirror those devices for redundancy.