当出现这些不幸的情况时，Linux 没有机会彻底卸载文件系统。
When these unfortunate situations occur, Linux doesn't have the opportunity to cleanly unmount the filesystem.
当Linux关闭时，它仔细地把所有的缓冲区数据转送到磁盘，并确保文件系统被彻底卸载，以保证系统再次启动时能够使用。
When Linux shuts down, it carefully flushes all cached data to disk and ensures that the filesystem is cleanly unmounted, so that it's ready for use when the system starts up again.
有时，我会格外彻底地卸载一个卷组内所有的文件系统，并使用外壳脚本中的循环脚本来完成此项任务以防出现潜在问题。
Sometimes, I will be extra thorough in unmounting all file systems in a volume group and doing this with a small loop in a shell script in case there is a latent problem.
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