/** removes a specified block from MiniDFS storage and reports it as corrupt */
private void removeAndReportBlock(
DistributedFileSystem blockDfs, Path filePath, LocatedBlock block) throws IOException {
TestRaidDfs.corruptBlock(filePath, block.getBlock(), NUM_DATANODES, true);
// report deleted block to the name node
LocatedBlock[] toReport = {block};
blockDfs.getClient().namenode.reportBadBlocks(toReport);
}
