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Sun Cluster Geographic Edition System Administration Guide

Configuring the /etc/horcm.conf File

You must configure the Hitachi TrueCopy device group on shared disks in the secondary cluster just as you did on 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 9–3 Example Section of the /etc/horcm.conf File on the Secondary Cluster

dev_group

dev_name

port number

TargetID

LU number

MU number

devgroup1

pair1

CL1–C

0

20

 

devgroup1

pair2

CL1–C

0

21

 

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–C , 0, 20>. The second pair, pair2, is from the d2 disk and is identified by the tuple <CL1–C, 0, 21>.

After you have configured the /etc/horcm.conf file on the secondary cluster, you can see the status of the pairs by using the pairdisplay command as follows:


phys-paris-1# pairdisplay -g devgroup1
Group PairVol(L/R) (Port#,TID,LU),Seq#,LDEV#,P/S,Status,Fence,Seq#,P-LDEV# M
devgroup1 pair1(L) (CL1-A , 0, 1) 54321 1..  SMPL ----  ------,----- ----  -
devgroup1 pair1(R) (CL1-C , 0, 20)12345 609..SMPL ----  ------,----- ----  -
devgroup1 pair2(L) (CL1-A , 0, 2) 54321 2..  SMPL ----  ------,----- ----  -
devgroup1 pair2(R) (CL1-C , 0, 21)12345 610..SMPL ----  ------,----- ----  -