Shutting Down One Cluster Node; Powering Down The Cluster - HP StorageWorks 4000s - NAS Administration Manual

Shutting Down One Cluster Node

Shutting down a cluster node causes file shares served by that node to fail over to the other
node(s). This will cause any currently executing client read and write operations to fail until
the cluster failover process completes. The other node(s) will be placed under a heavier load
by the extra work until the second node is powered up and rejoins the cluster.

Powering Down the Cluster

The power down process for the NAS 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 nodes
2. Removing power from the cluster nodes
The sequence of these steps is critical. The devices must be shut down before the storage
subsystem. Improperly shutting down the nodes and the storage subsystem causes corruption
and loss of data.
NAS 4000s and 9000s Administration Guide
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.
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.
Cluster Administration
229