The SunPlex system uses volume management software to increase the availability of data by using mirrors and hot spare disks, and to handle disk failures and replacements.
The SunPlex system does not have its own internal volume manager component, but relies on the following volume managers:
Solaris Volume Manager
VERITAS Volume Manager
Volume management software in the cluster provides support for:
Failover handling of node failures
Multipath support from different nodes
Remote transparent access to disk device groups
When volume management objects come under the control of the cluster, they become disk device groups. For information about volume managers, refer to your volume manager software documentation.
An important consideration when planning your disksets or disk groups is to understand how their associated disk device groups are associated with the application resources (data) within the cluster. Refer to the Sun Cluster 3.1 Software Installation Guide and the Sun Cluster 3.1 Data Service Planning and Administration Guide for discussions of these issues.