}
	if diskID == offlineDiskUUID {
		return -1, -1, fmt.Errorf("DriveID: %s is offline", diskID)
	}
	for i := range len(refFormat.Erasure.Sets) {
		for j := 0; j < len(refFormat.Erasure.Sets[0]); j++ {
			if refFormat.Erasure.Sets[i][j] == diskID {
				return i, j, nil
			}
		}
	}

	return -1, -1, fmt.Errorf("DriveID: %s not found", diskID)
}

	for i := range len(tmpFormat.Erasure.Sets) {
		for j := 0; j < len(tmpFormat.Erasure.Sets[i]); j++ {
			if this == tmpFormat.Erasure.Sets[i][j] {
				return nil
			}
		}
	}
	return fmt.Errorf("DriveID %s not found in any drive sets %s", this, format.Erasure.Sets)
}

// saveFormatErasureAll - populates `format.json` on disks in its order.