https://community.cloudera.com/t5/Support-Questions/How-to-remove-a-data-disk-from-all-data-nodes-in-a-running/m-p/313803#M225731 <P>&nbsp;</P><P>You can update the configuration (remove single disk that you don't need)&nbsp; and perform a restart on one datanode at a time. Ensure that there are no under replicated blocks (namenode UI will show that)&nbsp; in between datanode restarts. I found this to be safest approach.</P><P>SDL</P> Mon, 29 Mar 2021 14:47:42 GMT SDL 2021-03-29T14:47:42Z