gistfile1.txt

#!/bin/bash
baddisks=()
for disk in "/" "/disk2" "/disk3" ; do
        if [[ -d ${disk} ]]; then
                touch ${disk}/test 2>/dev/null || baddisks+=(${disk})
                rm ${disk}/test 2>/dev/null
        fi
done

count="${#baddisks[@]}"

if (( ${count} > 0 )); then
        echo "${baddisks[@]}"
        exit ${count}
fi

exit 0