if err != nil {
				t.Errorf("MinIO %s: Error decoding the recorded response Body", instanceType)
				return
			}
			// push the obtained upload ID from the response into the array.
			testUploads.Lock()
			testUploads.uploads = append(testUploads.uploads, multipartResponse.UploadID)
			testUploads.Unlock()
		}()
	}
	// Wait till all go routines finishes execution.
	wg.Wait()

		s.Unlock()
	}

	volumeDir, err := s.getVolDir(volume)
	if err != nil {
		return err
	}

	return s.writeAll(ctx, volume, path, b, true, volumeDir)
}

// AppendFile - append a byte array at path, if file doesn't exist at
// path this call explicitly creates it.
func (s *xlStorage) AppendFile(ctx context.Context, volume string, path string, buf []byte) (err error) {
	volumeDir, err := s.getVolDir(volume)