Loads HFS+ volume information

def load(self, filename, offset):
        """Loads HFS+ volume information"""
        try:
            self.offset = offset
            self.fd = open(filename, 'rb')
            # 1024 - temporary, need to find out actual volume header size
            self.fd.seek(self.offset + VOLUME_HEADER_OFFSET)
            data = self.fd.read(1024)
            self.vol_header = VolumeHeader(data)

            self.fd.close()
        except IOError as e:
            print(e)