RAC question.

Hi experts,
I have a RAC 4 nodes 11.2.0.2.2 installed (under Redhat Linux). The crs
homes and db homes are patched with the latest PSU + Mutex patch; csr home
patched + db home patched. Also, every node has it is own crs home and db
home.

Now I need to add a new node to the cluster; On the new node there is only
OS level running , nothing installed.
In the documentation below; there are general steps of how to do it.:
http://download.oracle.com/docs/cd/E14072_01/rac.112/e10717/adddelclusterware.htm

My question is;

1- Should I patch the new added node after running addnode.sh OR this
command will take care of everything? Everything means; it will patch my db
home and crs home of the new node.

2- During adding the new node, the whole cluster and database must be down ?

Thank you,
S


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