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Sun Cluster Geographic Edition Data Replication Guide for Hitachi TrueCopy

Configuring the /etc/horcm.conf File

Configure Hitachi TrueCopy device groups on shared disks in the primary cluster by editing the /etc/horcm.conf file on each node of the cluster that has access to the Hitachi array. Disks d1 and d2 are configured to belong to a Hitachi TrueCopy device group, devgroup1. The application, apprg1, can run on all nodes that have Hitachi TrueCopy device groups configured.

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 1–2 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.