请教：多次执行ontape备份时的覆盖问题(TAPEDEV是文件)？？

onconfig.clr参数设置如下：

# System Archive Tape Device

TAPEDEV         /clr/clrbak     # Tape device path

# Log Archive Tape Device

LTAPEDEV        /clr/logbak     # Log tape device path

这里采用文件作为备份的目的地
ontape -s -L 0/ontape -a
当第二次执行ontape备份时，发现会覆盖前一次备份的内容

请教：有什么方法在第二次备份时可以不覆盖前一次的内容，另外对于tape作为目的地来说，是否会出现这样的覆盖情况？？

换文件？～～～

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