#!/bin/bash
tempfile="tmpfile_hdd-speed-test.tmp"
size_MB="1000"
# Cache leeren
echo 3 > /proc/sys/vm/drop_caches

# Schreib - Test
echo
echo "[Starte] Schreib - Test"
dd if=/dev/zero of="$tempfile" bs=1M count="$size_MB" conv=fdatasync,notrunc
echo "[Beendet] Schreib - Test"
echo "------------------------------"
echo

# Lese - Test aus Cache
echo "[Starte] Lese - Test aus Cache"
dd if="$tempfile" of=/dev/zero
echo "[Beendet] Lese - Test aus Cache"
echo "------------------------------"
echo

# Cache leeren
echo 3 > /proc/sys/vm/drop_caches

# Lese - Test normal
echo "[Starte] Lese - Test"
dd if="$tempfile" of=/dev/zero
echo "[Beendet] Lese - Test normal"
echo "------------------------------"
echo
# tempfile löschen
echo "[Info] lösche tmp file"
rm -f "$tempfile"
echo "------------------------------"