#!/bin/bash
# Hard Disk Write Test Script, by Macie
# Purpose: Test clean hd wirtes on the filsystem, useful for verifiying hd stability.
# Also useful for over-writting drives with random data.
# Use of ramdisk for source temp file is recommened

FILE_SIZE="10" #File chunks in MB
FILE_NAME="/tmp/${FILE_SIZE}MB.FILE" # Temp file
FILE_MAXX="300000" # In MB, wite files until total size is reached
FILE_PATT="01010101010101010101"
WRITE_LOC=$1
CONVT="1"
FSIZE="0"

# Where do we write?
if [ ! -d $WRITE_LOC ]; then
   echo "Usage:  ./hd.test <location (/mnt/hdc)>"
   echo $WRITE_LOC
   exit 1
fi
# Make the tmp file first
if [ -f "$FILE_NAME" ]; then
   TSIZE=`du -s $FILE_NAME`
   TSIZE=`echo $TSIZE| cut -d' ' -f1`
else
   touch $FILE_NAME
   TSIZE=0
fi
clear; echo "Creating temp file chunk..."
let MSIZE=FILE_SIZE*1000

# Increase pattern size for faster writing
echo "Building file pattern..."
while [ $CONVT -lt 18 ]; do
      FILE_PATT="$FILE_PATT$FILE_PATT"
      let CONVT=CONVT+1
done
sleep 1
CONVT=1
while [ $TSIZE -lt $MSIZE ]; do
      echo "Current size: $TSIZE KB ($FILE_NAME)"
      echo "$FILE_PATT" >> $FILE_NAME
      TSIZE=`du -s $FILE_NAME`
      TSIZE=`echo $TSIZE| cut -d' ' -f1`
      clear
done
# Start HD writing
while true; do
    echo "Total written: $FSIZE MB"
    echo "Writing file: $CONVT"
    cp -f $FILE_NAME $WRITE_LOC/$CONVT
    let CONVT=CONVT+1
    let FSIZE=FSIZE+$FILE_SIZE
    clear
done
echo "Finished..."