dnInfos[1][0] = DFSTestUtil.getLocalDatanodeInfo();
dnInfos[1][1] = DFSTestUtil.getLocalDatanodeInfo();
String[][] storageIDs = {{"s00"}, {"s10", "s11"}};
BlockCommand bc = new BlockCommand(DatanodeProtocol.DNA_TRANSFER, "bp1",
blocks, dnInfos, storageIDs);
BlockCommandProto bcProto = PBHelper.convert(bc);
BlockCommand bc2 = PBHelper.convert(bcProto);
assertEquals(bc.getAction(), bc2.getAction());
assertEquals(bc.getBlocks().length, bc2.getBlocks().length);
Block[] blocks2 = bc2.getBlocks();
for (int i = 0; i < blocks.length; i++) {