if !s.checkID(p.DiskID) {
		return grid.NewRemoteErr(errDiskNotFound)
	}
	volume := p.Volume
	filePath := p.FilePath

	resp, err := s.getStorage().CheckParts(ctx, volume, filePath, p.FI)
	if err != nil {
		return grid.NewRemoteErr(err)
	}
	out <- resp
	return grid.NewRemoteErr(err)
}

	var opts WalkDirOptions
	_, err := opts.UnmarshalMsg(payload)
	if err != nil {
		return grid.NewRemoteErr(err)
	}

	if !s.checkID(opts.DiskID) {
		return grid.NewRemoteErr(errDiskNotFound)
	}

	ctx, cancel := context.WithCancel(ctx)
	defer cancel()
	return grid.NewRemoteErr(s.getStorage().WalkDir(ctx, opts, grid.WriterToChannel(ctx, out)))