If using disk replication to materialize your standby database, work with your disk replication vendor to provide on-demand or “snapshot” copies of your primary database and log files. You will also need to work with your primary database vendor to determine exactly what files and steps must be taken to successfully execute the standby database from snapshot file copies.
The snapshot log file copies cannot be
the same target files as the synchronous mirror of the log files
used for ongoing replication. Once copied, the snapshot files at
the standby site will be owned, and written to, by the standby database.
The synchronous mirror of the log files must continue to be active
copies of the primary database log files.