title: How to remove disk from running Hadoop cluster?
body: <p>I got a 6 Node Hadoop cluster with HDP 2.3 installed.</p>
  
  <p>Node consist 2 drive one is of 50 TB and other is of 2 TB, now the disk with 2 TB is full. But i want to remove this disk from all node and only wanna use 50 TB disk for Hadoop.</p>
  
  <p><strong>Question</strong></p>
  
  <p>Can i safely remove data disk without causing missing/corrupt blocks on Cluster.</p>
  
  <p><strong>Update</strong></p>
  
  <p>output of mount command is below</p>
  
  <pre><code>/dev/sda6 on / type ext4 (rw)
  proc on /proc type proc (rw)
  sysfs on /sys type sysfs (rw)
  devpts on /dev/pts type devpts (rw,gid=5,mode=620)
  tmpfs on /dev/shm type tmpfs (rw)
  /dev/sda3 on /boot type ext4 (rw)
  none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
  /tmp on /tmp type none (rw,bind)
  /var/tmp on /var/tmp type none (rw,bind)
  /home on /home type none (rw,bind)
  sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
  /dev/sdc1 on /data1 type xfs (rw)
  /dev/sdb1 on /data type xfs (rw)
  </code></pre>
  
  <p>And value for property dfs.datanode.data.dir is <em>/data/hadoop/hdfs/data,/data1/hadoop/hdfs/data</em></p>