Disable HDD queue scheduler on core1
sudo dd of=/sys/block/sda/queue/scheduler <<<none
sudo dd of=/sys/block/sdb/queue/scheduler <<<none
sudo dd of=/etc/udev/rules.d/60-scheduler.rules <<<'ACTION=="add|change", KERNEL=="sd[ab]", ATTR{queue/scheduler}="none"'
sudo udevadm control --reload
Edited by MyIgel