we have ambari cluster - version 2.6.1
HDP - version 2.6.4
each datanode have 12 disks with 500G size
one of the disk is faulty disk and need to replace it
what are the full steps that required , in order to replace the faulty disk
Below article help you to replacing faulty disks on datanode.
Please accept the answer you found most useful.
any way why not just to the follwing steps:
1. stop all data node component
put the host in maintenance mode - I am not sure if this step is needed ?
2. shutdown the datanode machine
3. replace the fault disk
4. start the datanode machine
5. start the datanode components
Decommissioning is a process that supports removing components and their hosts from the cluster. You must decommission a master or slave running on a host before removing it or its host from service. Decommissioning helps you to prevent potential loss of data or disruption of service. Below HDP documentation for Ambari-2.6.1 help you to decommission a DataNode. When DataNode decommissioning process is finished, the status display changes to Decommissioned.
I hope that the above answers your questions.
(This is just partial answer to your last update)
Decommissioning DataNodes can be done in the following way for Ambari 2.6.1
Ambari UI --> Hosts (Tab) --> "Actions" (Drop down) --> All Hosts / Filtered Hosts (choose based on your need) --> Choose "DataNode" option --> Decommission