Apply DB2 logs from production to DR

Is it possible to Apply DB2 9.5 logs files from Production site to DR site? Or do I have to do Backup/Restore and rollforward ...? I copied log files from production site to DR and issued the following command: rollforward db DBNAME to end of logs and stop overflow log path (/home/db2inst1/logs) noretrieve Got the error: > DB is not in Rollforward Pending