Actually, according to recent testing by ArsTechinca [0] performance with RAID the topic is more complicated. The testing is focused on ZFS but, quoting from t

Actually, according to recent testing by ArsTechinca [0] performance with RAID the topic is more complicated. The testing is focused on ZFS but, quoting from the conclusion: If you're looking for raw, unbridled performance it's hard to argue against a properly-tuned pool of ZFS mirrors. RAID10 is the fastest per-disk conventional RAID topology in all metrics, and ZFS mirrors beat it resoundingly—sometimes by an order of magnitude—in every category tested, with the sole exception of 4KiB uncached reads. [0] https://arstechnica.com/gadgets/2020/05/zfs-versus-raid-eight-ironwolf-disks-two-filesystems-one-winner/ https://arstechnica.com/gadgets/2020/05/zfs-versus-raid-eigh...