A system and method for controlling peer-to-peer remote copy (PPRC)
operations initiated from one or more host devices that desire to store
data contents written to a first storage system to a second storage
system over a communications link. The system enables receipt and
generation of copy services commands from host devices and the
determination of whether a received command pertains to a copy service
over an established PPRC relationship for that particular customer to
enable that customer to perform storage operations effecting data written
to a first storage server having source volumes and stored in a remote
second storage system having target volumes. The copy services command
effecting data contents of source volumes and/or remote target volumes
will be enabled if it is determined that said PPRC relationship is
already established for that customer; and, prevented if the received
copy services command does effect any volume not already in a copy
services relationship.