// Start writing `xl.meta` to all disks in parallel.
	for index := range onlineDisks {
		g.Go(func() error {
			if onlineDisks[index] == nil {
				return errDiskNotFound
			}
			return onlineDisks[index].UpdateMetadata(ctx, bucket, object, fi, opts)
		}, index)
	}

	// Wait for all the routines.
	mErrs := g.Wait()

	return reduceWriteQuorumErrs(ctx, mErrs, objectOpIgnoredErrs, fi.WriteQuorum(er.defaultWQuorum()))

	}

	return s.deleteFile(volumeDir, pathJoin(volumeDir, path, xlStorageFormatFile), true, false)
}

// Updates only metadata for a given version.
func (s *xlStorage) UpdateMetadata(ctx context.Context, volume, path string, fi FileInfo, opts UpdateMetadataOpts) (err error) {
	if len(fi.Metadata) == 0 {
		return errInvalidArgument
	}

	volumeDir, err := s.getVolDir(volume)