fdisk -l
新的2T盘为/dev/sde
parted -s /dev/sde mklabel gpt mkpart primary 0% 100%
格式化：
mkfs.ext4 /dev/sde1
挂载硬盘：
mount /dev/sde /data2
正常启动datanode服务，但是报错，如下：
“/var/log/hadoop/hdfs/hadoop-hdfs-datanode-dn61.100.cloud.log” 727814L, 246556758C
2016-01-20 09:55:57,892 WARN datanode.DataNode (BPOfferService.java:getBlockPoolId(143)) – Block pool ID needed, but service not yet registered with NN
java.lang.Exception: trace
at org.apache.hadoop.hdfs.server.datanode.BPOfferService.getBlockPoolId(BPOfferService.java:143)
at org.apache.hadoop.hdfs.server.datanode.BlockPoolManager.remove(BlockPoolManager.java:91)
at org.apache.hadoop.hdfs.server.datanode.DataNode.shutdownBlockPool(DataNode.java:899)
at org.apache.hadoop.hdfs.server.datanode.BPOfferService.shutdownActor(BPOfferService.java:350)
at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.cleanUp(BPServiceActor.java:619)
at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:837)
at java.lang.Thread.run(Thread.java:745)
2016-01-20 09:55:57,892 INFO datanode.DataNode (BlockPoolManager.java:remove(99)) – Removed Block pool (Datanode Uuid unassigned)
2016-01-20 09:55:57,892 WARN datanode.DataNode (BPOfferService.java:getBlockPoolId(143)) – Block pool ID needed, but service not yet registered with NN
java.lang.Exception: trace
at org.apache.hadoop.hdfs.server.datanode.BPOfferService.getBlockPoolId(BPOfferService.java:143)
at org.apache.hadoop.hdfs.server.datanode.DataNode.shutdownBlockPool(DataNode.java:901)
at org.apache.hadoop.hdfs.server.datanode.BPOfferService.shutdownActor(BPOfferService.java:350)
at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.cleanUp(BPServiceActor.java:619)
at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:837)
at java.lang.Thread.run(Thread.java:745)
2016-01-20 09:55:59,892 WARN datanode.DataNode (DataNode.java:secureMain(2049)) – Exiting Datanode
2016-01-20 09:55:59,894 INFO util.ExitUtil (ExitUtil.java:terminate(124)) – Exiting with status 0
2016-01-20 09:55:59,896 INFO datanode.DataNode (StringUtils.java:run(640)) – SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down DataNode at dn61.100.cloud/172.16.8.72
解决方法：
发现权限不一样，正常的是755权限，有问题的是750，修改权限，chmod 755 -R /data2
异常的
[root@dn6 data2]# ll
drwxr-x— 4 root root 4096 Jan 20 10:16 hadoop
drwx—— 2 root root 16384 Jan 19 15:38 lost+found
正常的
[root@dn6 data2]# ll
drwxr-xr-x 4 root root 4096 Jan 20 10:16 hadoop
drwx—— 2 root root 16384 Jan 19 15:38 lost+found