Ambari is reporting that I have a Failed Disk Volume. How do I determine which datanode is having the issue and repair it?
You can see them in Namenode UI under 'Datanode volume failures'.
Below will be URL for your namenode:
http://<Active Namenode FQDN>:50070/dfshealth.html#tab-datanode-volume-failures
Hope this helps you.
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Thanks @Sridhar Reddy. I found it in the Quick Links in Ambari.