Note the following when creating volumes for the data and SRL:
The sizes and names of the volumes must match the sizes and names of the corresponding volumes in the primary site before you create the disk group.
The disk group must match the size and name of the disk group at the primary site.
Create the data and SRL volumes on different disks in the disk group. Use the vxdisk -g diskgroup list command to list the disks in the disk group.
Mirror the volumes.
To create the data and SRL volumes on the secondary site
# vxassist -g oradatadg make rac_vol1 6800M nmirror=2 disk1 disk2
# vxassist -g oradatadg make rac1_srl 1500M nmirror=2 disk4 disk6