检查hdfs-site.xml和core-site.xml。相关属性包括：

<configuration>

<property>
  <name>dfs.name.dir</name>
  <value>/var/lib/hadoop/dfs/name</value>
  <description>Determines where on the local filesystem the DFS name node should store the name     table(fsimage). If this is a comma-delimited list of directories then the name table is replicated in all of the directories, for redundancy.
The default is ${hadoop.tmp.dir}/dfs/name.
  </description>
</property>

<property>
  <name>dfs.data.dir</name>
  <value>/var/lib/hadoop/dfs/data</value>
  <description>Determines where on the local filesystem an DFS data node should store its blocks. If this is a comma-delimited list of directories, then data will be stored in all named directories, typically on different devices. Directories that do not exist are ignored.
  The default is ${hadoop.tmp.dir}/dfs/data.
  </description>
</property>

</configuration>

我怀疑你在什么地方有档案。删除它，它将使用正确的路径设置。