CMMVC8818E The command failed because the volume already has a copy in the specified site. Use the addvdiskcopy command to add a second copy in the same site.
Explanation
An attempt was made to add a volume copy to a site by using the addvolumecopy command when the volume already has a copy in the specified site.
User response
Use the addvdiskcopy command to create an additional copy in the same site.