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Before replacing any CRUs in a PowerScale node, what is an important safety measure?

Before replacing any CRUs in a PowerScale node, what is an important safety measure?
A . Documenting the serial numbers of all components
B . Ensuring the node is logically removed from the cluster
C . Powering down the node and disconnecting it from the network
D . Verifying the node’s data is fully replicated to other nodes

Answer: C

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