#!/bin/bash

mapfile -t disks < <( ls /dev/sd[a-z] )
out=""
dim="\e[43m"
label="\e[1;30m"
COLUMNS=3
clear="\e[0m\e[39m"
my_target_temp=45

k=0
for i in ${disks[@]}; do
    temp=$(smartctl -a ${i} | grep Temperature_Celsius | grep 194     | awk '{print $10}' 2> /dev/null)
    color="\e[42m"
	((k++))
	if [ -z "$temp" ]; then
        out+=""
    else 
        if [ "$temp" -ge "${my_target_temp}" ]; then
            color="\e[41m"
        fi

        out+="$(printf "${dim}${label} %s \e[30m$color %-17s," "$(echo ${i} | sed -e 's/\/dev\///')" "$temp $clear")"
		if [ $(($k % $COLUMNS)) -eq 0 ]; then
                    out+="\n"
            fi
    fi
done
out+="\n"
printf "\n HDD Temps:\n"
printf "$out" | column -c $k -ts $',' | sed -e 's/^/  /'