#!/bin/sh

MMC="/media/mmc1"
DAT="$MMC/test.dat"
CNT=1024
SDREAD=""
SDWRITE=""

grep -q "$MMC" /etc/mtab
if [ $? == 0 ];
then
  echo "testing SD Card read/write speed. Please wait a few minutes."
  # Write test
  SDWRITE=`time -p dd if=/dev/zero of=$DAT bs=1M count=$CNT 2>&1|head -3|tail -1`
  # Read test
  SDREAD=`time -p cp $DAT /dev/null 2>&1|head -1`
  # Delete data file
  rm $DAT

  echo
  echo "Result"
  echo $SDREAD | awk '{print "Read:", 1024/$2, "MB/s"}'
  echo $SDWRITE | awk '{print "Write:", 1024/$2, "MB/s"}'
else
  echo "SD Card not found."
fi