public synchronized long[] allocNew(int nrClusters) throws IOException {
public synchronized long allocNew() throws IOException {
	public synchronized long[] allocNew(int nrClusters) throws IOException {		long rc[] = new long[nrClusters];		rc[0] = allocNew();		for (int i = 1; i < nrClusters; i++) {			rc[i] = allocAppend(rc[i - 1]);		}		return rc;	}