Oracle：如何彻底删除备份软件系统所使用的 虚拟tape设备的备份信息？！

 

 

allocate channel for maintenance device type sbt parms 'SBT_LIBRARY=oracle.disksbt, ENV=(BACKUP_DIR=/tmp)';
crosscheck backup;
delete noprompt expired backup;

list archivelog all;
list backup summary;