src/Ovh/Vps/Vps.php
public function getDiskUsage($diskId, $type)
    {
        return json_decode(self::getClient()->getDiskUsage($this->getDomain(), $diskId, $type));
    }
public function getDiskUsage($diskId, $type)
    {
        return json_decode(self::getClient()->getDiskUsage($this->getDomain(), $diskId, $type));
    }
Get disk usage

@param $diskId
@param $type
@return object