if dataDir == "" {
		return nil
	}
	g := errgroup.WithNErrs(len(onlineDisks))
	for index := range onlineDisks {
		g.Go(func() error {
			if onlineDisks[index] == nil {
				return nil
			}
			return onlineDisks[index].Delete(ctx, bucket, pathJoin(object, dataDir), DeleteOptions{