5.On each node on the R2 side (node3 and node4), associate the local BCV devices to the R2 device group.

#symbcv -g dgoraA add dev 01A

#symbcv -g dgoraA add dev 01B

#symbcv -d dgoraB add dev 052

#symbcv -d dgoraB add dev 053

6.To manage the BCV devices from the R1 side, it is necessary to associate the BCV devices with the device groups that are configured on the R1 side. Use the following commands on hosts directly connected to the R1 Symmetrix.

#symbcv -g dgoraA associate dev 01A -rdf

#symbcv -g dgoraA associate dev 01B -rdf

#symbcv -g dgoraB associate dev 052 -rdf

#symbcv -g dgoraB associate dev 053 -rdf

7.Establish the BCV devices using the following commands from the R2 side.

#symmir -g dgoraA -full est

#symmir -g dgoraB -full est

8.Alternatively, establish the BCV devices with the following commands from the R1 side.

#symmir -g dgoraA -full est -rdf

#symmir -g dgoraB -full est -rdf

Configuring Gatekeeper Devices

It is necessary to have a gatekeeper device for each device group in the consistency group that will be built in a later step. Use the following commands on all nodes on the R1 side to define gatekeepers and associate them with device groups.

#symgate -sid 638 define dev 010

#symgate -sid 130 define dev 009

#symgate -sid 638 -g dgoraA associate dev 010

#symgate -sid 130 -g dgoraB associate dev 009

Use the following commands on all nodes on the R2 side to define gatekeepers and associate them with device groups.

#symgate -sid 021 define dev 002

#symgate -sid 363 define dev 00B

#symgate -sid 021 -g dgoraA associate dev 002

#symgate -sid 363 -g dgoraB associate dev 00B

Creating the Consistency Groups

To configure consistency groups for using Metrocluster with EMC SRDF, first create device groups and gatekeeper groups as described in previous sections.

The following examples are based on the configuration shown in Figure 47.

Use the following steps for each package:

1.On each node in the cluster, create an empty consistency group using the symcg command.

To create a consistency group using PowerPath on the R1 side, use

#symcg create cgoradb -ppath -type rdf1

Replace rdf1 with rdf2 in the command to create the consistency group on the R2 side.

Building a Metrocluster Solution with EMC SRDF 267