ANTR8810I
OK request {SUCCESSFUL|ACCEPTED}.

Explanation

The specified request has either completed successfully or been accepted for processing.

In the message text:
request
The request completed is either a query or LEVEL request, as displayed.
SUCCESSFUL
The request has completed successfully
ACCEPTED
Indicates that the system issues a message to the operator console indicating the results of the request.

System action

The request completes.

Source

ESS FlashCopy®, Peer-to-peer remote copy (PPRC), Global Mirror, or z/OS® Global Mirror (XRC).