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IBM System Storage N series Hardware Guide by Marco Schwarz, Tom Provost, Steven Pemberton, Dirk Peitzmann, Jeff Lin, Roland Tretau

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Highly Available controller pairs
IBM System Storage N series HA pair configuration consists of two nodes that are able to take over and fail over their resources or services to counterpart nodes. This function assumes that all resources can be accessed by each node. This chapter addresses aspects of determining HA pair status, and HA pair management.
In Data ONTAP 8.x, the recovery capability provided by a pair of nodes (storage systems) that is called an HA pair. This pair is configured to serve data for each other if one of the two nodes stops ...

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