NEC D3/D4 Quick Start Guide
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Appendix: Configuring Multipathing
NEC Storage PathManager enables multi-path connection capabilities with the array that allow the configuration
of path failover for redundancy, load balancing between paths for performance improvements, and clustering
support.
PathManager consists of the following components:
•
PathManager Driver
– A driver that manages and controls basic PathManager functionality, such as
redundant paths and load balancing.
•
Operation Command (spscmd)
– A command-line utility that allows you to check the status of paths
and configure PathManager settings.
•
Path Patrol Service
– A service that automatically monitors path status and collects information from
the PathManager driver for log collection activities.
•
Log Service
– A service that writes events related to PathManager activity to the Event Log.
PathManager can be installed in a single-server direct connection configuration, a multi-server loop or fabric
configuration, and a clustered server configuration to eliminate the need for failover to be configured on the
cluster nodes.
Installing PathManager
This section describes the installation process for PathManager on a Microsoft Windows Server 2003 or
Microsoft Windows Server 2008 system. For information about installing PathManager in other environments,
please refer to the PathManager documentation contained on the StorageManager CD.
1. If there is already data on the logical disk in use, disconnect the application server from the storage
array before continuing.
Note:
It is important that the server not be connected to the array until the PathManager setup has been
completed, to prevent damage to the file system.
Note:
When installing ExpressCluster (ClusterPro) with PathManager, install PathManager first and
then install ExpressCluster MSFC.
2. Start the installation process from the Storage Manager CD through the Web-based browser interface
available by running Index.HTML from the root of the CD drive. Follow the links from there to the NEC
Storage PathManager installation appropriate for your operating system.
