[ceph-users] Moving OSD from one node to another

Dear ceph folks, I encoutered an interesting situation as follows: an old FC SAN is connected two ceph OSD nodes, and its LUNs are used as virtual OSDs. When one node fails, its LUN can be taken over by anther node. My question is, how to start up the OSD on the new node without reconstructing its data? In other words, is there a simple to move OSD from one node to another? many thanks, samuel huxiaoyu@horebdata.cn