Configuring the /etc/horcm.conf File

First, configure the Hitachi TrueCopy device groups on shared disks in the primary cluster. Disks d1 and d2 are configured to belong to a Hitachi TrueCopy device group that is called devgroup1. This configuration information is specified in the /etc/horcm.conf file on each of the cluster's nodes that has access to the Hitachi array. The application, apprg1, can run on these cluster nodes.

For more information about how to configure the /etc/horcm.conf file, see the Sun StorEdge SE 9900 V Series Command and Control Interface User and Reference Guide.

The following table describes the configuration information from our example that is found in the /etc/horcm.conf file.

Table 9–2 Example Section of the /etc/horcm.conf File on the Primary Cluster

dev_group	dev_name	port number	TargetID	LU number	MU number
devgroup1	pair1	CL1–A	0	1
devgroup1	pair2	CL1–A	0	2

The configuration information in the table indicates that the Hitachi TrueCopy device group, devgroup1, contains two pairs. The first pair, pair1, is from the d1 disk, which is identified by the tuple <CL1–A , 0, 1>. The second pair, pair2, is from the d2 disk and is identified by the tuple <CL1–A, 0, 2>. The replicas of disks d1 and d2 are located in a geographically separated Hitachi TrueCopy array. The remote Hitachi TrueCopy is connected to the partner cluster.