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You really do not want hardware raid. You want software raid like LVM or better yet, ZFS.
Do your own research. Keep in mind raid isn't a backup. It is only for convenience.
A lot of "hardware raid" is just a separate controller doing software raid. I thought I lost access to a bunch of data when my raid controller died, before I realized that I could just plug the disks directly into the computer and mount them with mdadm. But yes, hardware raid seems a bit pointless nowadays.
If op is considering ZFS: Do. Not. Use. RAIDz. (learned the hard way)
Why wouldn't you? It is the most flexible out if all of them.
In my experience, using spinning disks, the performance is very poor, and times for scrub and resilver are very long. For example, in a raidz1 with 4x8TB, scrubbing takes 2-3 weeks and resilvering takes almost 2 months. I must also add very poor performance in degraded state. This is a very old post, but things are still the same.
I've not had that experience
You must have shingled/SMR drives. They do not work well with any type of raid array.
My array of 7x12TB drives resilvers in a few hours, as I made sure I got CMR drives
That makes total sense. Thanks!