单选题During implementation of a two-node cluster，it is determined that error notification for the shared Disk subsystem would be beneficial. Which of the following is a pre-requisite for implementing automatic error notification？（）A The cluster must not be running.B The cluster.es.server.utils lpp must be installed.C The error notification module must be enabled in RSCT.D The permissions on /tmp/hacmp.out need to be changed to 774.
单选题
During implementation of a two-node cluster，it is determined that error notification for the shared Disk subsystem would be beneficial. Which of the following is a pre-requisite for implementing automatic error notification？（）
A
The cluster must not be running.
B
The cluster.es.server.utils lpp must be installed.
C
The error notification module must be enabled in RSCT.
D
The permissions on /tmp/hacmp.out need to be changed to 774.
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