A mount point is a directory within a file system hierarchy that serves as an entry point for a separate storage device or partition. When a file system is mounted to a directory, that directory becomes the root of the newly attached storage, allowing users to interact with it as part of the local tree. Any files existing in the mount point directory before the operation become obscured until the device is unmounted.
In Unix-like systems, the mounting process binds the storage device's root to a specific node in the global hierarchy. System administrators manage these connections using the mount utility and persistent entries in the /etc/fstab configuration file. While Windows traditionally uses drive letters, NTFS also supports mounting volumes into empty folders to bypass drive letter limitations.
How it works
Mount points enable flexible storage management by allowing administrators to swap physical hardware without changing application file paths. This abstraction is essential for maintaining database clusters or web servers where specific directories require different performance characteristics or redundancy levels.
- Allocating a dedicated
/var/logpartition to prevent system logs from filling up the root partition. - Mapping network-attached storage (NAS) to local paths like
/mnt/backupsfor seamless application access. - Using bind mounts to mirror directory trees for containerization or sandboxing purposes.