#!/bin/bash
MAX=100
BS=$((1024 * 2048))
COUNT=10
FPATH=/tmp

case $# in
        0)
                i=$COUNT
                ;;

        1)
                i=$1
                ;;
        *)
                printf "Error:\nSyntax: $0 [ numfiles ]\n"
                exit
                ;;
esac

if [[ $i -lt 1 ]]; then
        printf "Can't read $i files\n"
        exit
fi

if test \! -f `printf "%s/file%04d.mp0" $FPATH $i`; then
        c=$i
        echo "Writing $c files..."

        while [[ $c -gt 0 ]]; do
                file=`printf "%s/file%04d.mp0" $FPATH $c`
                touch $file
                dd if=/dev/urandom of=$file bs=$BS count=$COUNT
                c=$(( $c - 1 ))
        done
fi

printf "Reading $i files..\n"

while [[ $i -gt 0 ]]; do
        file=`printf "%s/file%04d.mp0" $FPATH $i`
        dd if=$file of=/dev/null bs=$BS &
        i=$(( $i - 1 ))
done