#!/bin/sh -e
# Test disk performance
# Adapted from https://www.shellhacks.com/disk-speed-test-read-write-hdd-ssd-perfomance-linux/
test "$1" = "-w" && write=true && shift
disk="${1:-$(df --output=source . | tail -1)}"
if test "$write"
then exec &> >(tee "disktest-$(date +%F)")
fi
# Needs sudo for read test
sudo hdparm -MWAgt "$disk"
if test $# -eq 0
then echo "Write test:"
	sync
	# This prevents predictions by using random, but since that is too slow we have to copy a previously created file
	# sudo dd status=progress if=/dev/random of=/var/tmp/tempfile bs=1M count=1K && sudo dd status=progress if=/var/tmp/tempfile of=tempfile bs=1M count=1K
	# TODO adjust size to disk
	sudo dd status=progress if=/dev/zero of=tempfile bs=1000K count=1000
	sudo rm tempfile
fi