dmsetup remove_all
wipefs -a --force /dev/sdb1
mkfs -t ext4 -q -E lazy_itable_init=0,lazy_journal_init=0 -F /dev/sdb1
mkdir -p /fs/sdb1
mount -t ext4 /dev/sdb1 /fs/sdb1

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=ftruncate
iodepth=32
size=137438953472
direct=0
runtime=300
file_service_type=roundrobin
random_distribution=random
group_reporting
pre_read=0

nr_files=1
filesize=137438953472
invalidate=1
fallocate=posix
io_size=137438953472

[task_0]
rw=write
directory=/fs/sdb1
numjobs=1' | fio --output-format=json -