}
	update.header = ver.header()
	if prevMod != update.header.ModTime {
		x.sortByModTime()
	}
	return nil
}

// getDataDirs will return all data directories in the metadata
// as well as all version ids used for inline data.
func (x *xlMetaV2) getDataDirs() ([]string, error) {
	dds := make([]string, 0, len(x.versions)*2)
	for i, ver := range x.versions {
		if ver.header.Type == DeleteType {

		base := filepath.Base(name)
		_, err := uuid.Parse(base)
		if err == nil {
			foundDirs[base] = struct{}{}
		}
		return nil
	})
	if err != nil {
		return err
	}
	wantDirs, err := xl.getDataDirs()
	if err != nil {
		return err
	}

	// Delete all directories we expect to be there.
	for _, dir := range wantDirs {
		delete(foundDirs, dir)
	}

	// Delete excessive directories.