To migrate a healthy Primary from any host in an RDS:
# vradmin -g diskgroup migrate local_rvgname newprimary_name
The argument diskgroup is the disk group on the local host
The argument local_rvgname is the name of the RVG on the local host
The argument newprimary_name is the name of the new Primary host, that is, the existing Secondary host. For an RDS with only one Secondary, this argument is optional. Note that the newprimary_name argument must be the host name displayed by the vradmin printrvg command.