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Why can't I mount the same filesystem at multiple points, and why can't a mount-point inode reference count be > 1?

Fresh5 days ago
Mar 15, 202616524 views
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Problem

I'm reading The Design of the Unix Operating System by Maurice J Bach, and have two questions regarding file system mounting: Why does the file system mount fail when the reference count of the mount point inode is greater than 1 in the file table? Why does Unix disallow mounting a file system at m…

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Fix for: Why can't I mount the same filesystem at multiple points, and why can't a mount-point inode reference count be > 1?

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The HP (HP-UX) man page for says: If mount() fails, errno is set to one of the following values. A component of the path prefix denies search permission. path is currently mounted on, is someone's current working directory, or is otherwise busy. The…

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