Editing Network-attached storage (section)

== Examples ==
=== Open-source server implementations ===
[[Open-source software|Open-source]] NAS-oriented distributions of [[Linux]] and [[FreeBSD]] are available. These are designed to be easy to set up on commodity PC hardware, and are typically configured using a web browser.

They can run from a [[virtual machine]], [[Live CD]], [[booting|bootable]] USB flash drive ([[Live USB]]), or from one of the mounted hard drives. They run [[Samba (software)|Samba]] (an [[Server Message Block|SMB]] daemon), [[Network File System|NFS]] daemon, and [[File Transfer Protocol|FTP]] daemons which are freely available for those operating systems.

=== Network-attached secure disks===
'''Network-attached secure disks''' ('''NASD''') is 1997&ndash;2001 research project of [[Carnegie Mellon University]], with the goal of providing cost-effective scalable [[Computer data storage|storage]] [[Bandwidth (computing)|bandwidth]].<ref>{{cite web|url=http://www.pdl.cmu.edu/NASD/|title=NASD: Network attached secure disks}}</ref> NASD reduces the overhead on the file [[Server (computing)|server]] (file manager) by allowing storage devices to transfer data directly to [[Client (computing)|client]]s. Most of the file manager's work is offloaded to the storage disk without integrating the file system policy into the disk. Most client operations like Read/Write go directly to the disks; less frequent operations like authentication go to the file manager. Disks transfer variable-length objects instead of fixed-size blocks to clients. The File Manager provides a time-limited cachable capability for clients to access the storage objects. A file access from the client to the disks has the following sequence:

# The client authenticates itself with the file manager and requests for the file access.
# If the client can be granted access to the file requested, the client receives the [[Computer network|network]] location of NASD disks and their capability.
# If the client is accessing the disk for the first time, it receives a time-limited key for the establishment of secure communication to the disk.
# The file manager informs the corresponding disk using an independent channel.
# From now on, the client directly accesses the NASD disks by giving the capability it received and further data transfers go through the network, bypassing the file manager.

=== List of network protocols used to serve NAS ===
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* [[Andrew File System]] (AFS)
* [[Apple Filing Protocol]] (AFP)
* [[Server Message Block]] (SMB)
* [[File Transfer Protocol]] (FTP)
* [[Hypertext Transfer Protocol]] (HTTP)
* [[Network File System]] (NFS)
* [[rsync|{{mono|rsync}}]]
* [[SSH file transfer protocol]] (SFTP)
* [[Universal Plug and Play]] (UPnP)
{{div col end}}