#!/bin/bash

mapfile -t disks < <( ls /dev/sd[a-z] )
out=""
printf "\nHDD Power On Hours:\n"

for i in ${disks[@]}; do
    model=$(smartctl -a ${i} | grep "^Device Model:" | awk -F ':' '{print $2}' | xargs 2>/dev/null)
    # Получаем «чистые» часы 
    hours=$(smartctl -a ${i} | grep "^  9" | awk '{print $10}' | awk -F 'h' '{print $1}' 2>/dev/null)
    
    if [ -n "$hours" ]; then
        # Расчеты: 1 год = 8760ч, 1 месяц = 730ч, 1 день = 24ч
        y=$((hours / 8760))
        m=$(((hours % 8760) / 730))
        d=$(((hours % 730) / 24))
        
        time_str=""
        [ $y -gt 0 ] && time_str+="${y}y "
        [ $m -gt 0 ] && time_str+="${m}m "
        [ $d -gt 0 ] && time_str+="${d}d"
        [ -z "$time_str" ] && time_str="${hours}h"

        out+="  $model...$time_str\n"
    fi
done

printf "$out" | column -ts '...'