NAS (Network Attached Storage)

A NAS (Network Attached Storage) is a small server dedicated to storing and sharing files over a network. It typically holds multiple hard drives and is accessed using protocols such as SMB, NFS or a web interface.

Why it matters

A NAS gives a home or office a central place for shared files, backups, media and photo libraries, often with RAID for drive-failure protection. Many models also run apps, containers and sync tools.

Because it is network-based, uptime and connectivity matter. Monitoring it ensures you notice a failed disk or offline unit.

Example

$ mount -t nfs nas.local:/volume1/shared /mnt/shared
$ df -h /mnt/shared
Filesystem                Size  Used Avail
nas.local:/volume1/shared  7.3T  2.1T 5.2T

This mounts a NAS share on Linux.

Common mistakes

Treating RAID on the NAS as the only backup.
Exposing the NAS admin page directly to the internet.
Ignoring disk health alerts and firmware updates.

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