g := errgroup.WithNErrs(len(disks))

	objectPartInfos := make([][]*ObjectPartInfo, len(disks))
	// Rename file on all underlying storage disks.
	for index := range disks {
		index := index
		g.Go(func() (err error) {
			if disks[index] == nil {
				return errDiskNotFound
			}
			objectPartInfos[index], err = disks[index].ReadParts(ctx, bucket, partMetaPaths...)
			return err