dmsetup remove_all
wipefs -a --force /dev/sda
mkfs -t ext4 -q -F /dev/sda
mkdir -p /fs/sda
mount -t ext4 /dev/sda /fs/sda

for cpu_dir in /sys/devices/system/cpu/cpu[0-9]*
do
	online_file="$cpu_dir"/online
	[ -f "$online_file" ] && [ "$(cat "$online_file")" -eq 0 ] && continue

	file="$cpu_dir"/cpufreq/scaling_governor
	[ -f "$file" ] && echo "performance" > "$file"
done

echo '[global]
bs=4k
ioengine=sync
iodepth=32
size=6710886400
direct=0
runtime=300
invalidate=1
fallocate=posix
group_reporting

[task_0]
rw=randwrite
directory=/fs/sda
numjobs=64' | fio --output-format=json -