HP StorageWorks 4000s NAS 4000s and 9000s Administration Guide - Page 230
Powering Up the Cluster
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Cluster Administration Powering Up the Cluster The power up process for the NAS cluster is more complex than it is for a single node because extra care must be taken with the storage subsystem. The sequence of the power up steps is critical. Improper power up procedures can cause corruption and loss of data. Caution: Do not power up the cluster nodes without first powering up the storage subsystem, and verifying it is operating normally. Nodes should be powered up separately allowing one node to form the cluster prior to powering up the additional node(s). To power up the cluster nodes: 1. After the storage subsystem is confirmed to be operating normally, power up a single node by pressing the power button on the front of the device. Wait for the node to come completely up before powering up the subsequent node. If more than one node is powered up at the same time, the first node that completes the sequence will gain ownership of the cluster quorum and will control the cluster database. Designate a particular node as the usual cluster quorum owner by always powering up that node first and letting it completely restart before powering up additional cluster node(s). 2. Power up the additional cluster node(s) by pressing the power button on the front of the device. Each node should be allowed to start fully, prior to starting a subsequent node. As each node starts, the monitor displays the logon dialog. Background processes will start the cluster service and form the cluster. 230 NAS 4000s and 9000s Administration Guide