@lines = map {
        /(\/\w+\/\w+)\s+\w+\s+\d+\s+\d+\s+(\d+)\s+(\d+)%/;
        if ($1) {
                {
                        volume => $1,
                        available => $2,
                        free => 100 - $3,
                }
        }
        else {
                ()
        }
} split(/\n/, $space{$host});