zero_test.sh

#!/bin/bash

# This script is meant to test a drive to see if it's okay or not, by
# writing 100M files (filled with zeroes) until the space runs out.

set -eo pipefail

if [[ ! -d $1 ]]; then
    echo -e "Usage: $(basename "$0") [dir]\n"
    exit
fi

dir=$(readlink -f "$1")
out_dir="${dir}/zero-${RANDOM}"

mkdir -p "$out_dir"

n='0'

while [[ $? -eq 0 ]]; do
    n=$(( n + 1 ))
    of="${out_dir}/zero_${n}"

    if [[ ! -f $of ]]; then
        dd if=/dev/urandom of="$of" bs=1M count=100
    fi
done