你是要用物理备份来还原恢复数据库吗？
按以下步骤操作试试
检查备份
./dmrman CTLSTMT=“CHECK BACKUPSET ‘/data/dmbak/BACKUP_FULL_20210223’”

还原
./dmrman CTLSTMT=“RESTORE DATABASE ‘/data/dmdata/DAMENG/dm.ini’ FROM BACKUPSET ‘/data/dmbak/BACKUP_FULL_20210223’”
恢复
./dmrman CTLSTMT=“RECOVER DATABASE ‘/data/dmdata/DAMENG/dm.ini’ FROM BACKUPSET ‘/data/dmbak/BACKUP_FULL_20210223’”
更新DB_MAGIC
./dmrman CTLSTMT=“RECOVER DATABASE ‘/data/dmdata/DAMENG/dm.ini’ UPDATE DB_MAGIC”