Restarting a cluster node causes all file shares served by that node to fail over to the other nodes in the
cluster based on the failover policy in place. Until the failover process completes, any currently executing
read and write operations will fail. Other node(s) in the cluster will be placed under a heavier load by
the extra work until the restarted node comes up and the resources are m oved back.
Shutting down
one cluster node
CAUTION:
Shutting down a cluster node must be done only after confirming that the other node(s) in the cluster
are functioning normally. Adequate warning should be given to users connected to resources of the
node being shutdown.
Shutting down a cluster node causes file shares served by that node to fail over to the other node(s). This
causes any currently executing client read and write operations to fail until the cluster failover process
completes. The other node(s) are placed under a heavier load by the extra work u ntil the second node
ispoweredupandrejoinsthecluster.
Powering down the cluster
The power down process for the storage server cluster is similar to the process for a single node, but with
the cluster, extra care must be taken with the storage subsystem and the sequence of the shutdown.
The power down process is divided into two main steps:
1. Shutting down the cluster no des
2. Removing power from the cluster nodes
Thesequenceofthesestepsiscritical. Thedevicesmustbeshutdownbeforethestoragesubsystem.
Improperly shutting down the nodes and the storage subsystem causes corruption and loss of data.
CAUTION:
Before powering down the cluster nodes, follow the proper shutdown procedure as previously illustrated.
See “Shutting down one cluster node.” Only one cluster node should be shut down at a time.
CAUTION:
The cluster nodes should never be powered on when the storage subsystem is not available.
Powering up the cluster
The power up process for the storage server 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 s
hould be powered up sepa rately allowing on e node to form the cluster prior to powering up the
additional node(s). To power up the cluster nodes:
HPProLiantDL380G5StorageServer 139
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