'Create a new DiskDiagnostics object
:param read_bytes: Disk reads in bytes(Integer)
:param read_requests: Read requests (Integer)
:param write_bytes: Disk writes in bytes (Integer)
:param write_requests: Write requests (Integer)
:param errors_count: Disk errors (Integer)'

def add_disk(self, read_bytes=None, read_requests=None, write_bytes=None, write_requests=None, errors_count=None):

    self.num_disks += 1
    self.disk_details.append(DiskDiagnostics(read_bytes=read_bytes, read_requests=read_requests, write_bytes=write_bytes, write_requests=write_requests, errors_count=errors_count))
