nas définition simple

NAS stands for “Network-Attached Storage.” Basically, it’s a way to attach a hard drive to your network and make it accessible to all your devices for centralized file-sharing and backups. In 2009, NAS vendors (notably CTERA Networks[6][7] and Netgear) began to introduce online backup solutions integrated in their NAS appliances, for online disaster recovery.[8][9]. Like RAID 2, RAID 3 requires a special controller that allows for … List of network protocols used to serve NAS. Remote Authentication Dial-In User Service (RADIUS) is a networking protocol, operating on port 1812 or 1813, that provides centralized Authentication, Authorization, and Accounting (AAA or Triple A) management for users who connect and use a network service. In this article "file server" is generally used as the term contrasting to NAS, referring to the general-purpose computer used for serving files. Inspired by the success of file servers from Novell, IBM, and Sun, several firms developed dedicated file servers. Nas was born on September 14, 1973 in Brooklyn, New York. NAS systems are networked appliances that contain one or more storage drives, often arranged into logical, redundant storage containers or RAID. Whether it comes from a partition on the same drive, a new hard drive, media inserted into an optical drive, a NAS (network-attached storage) or SAN (storage-area network) device or some form of flash memory, any file system must be mounted before it can be displayed and its file system read. … A volume manager is software within an OS that controls capacity allocation for storage arrays, and it can help with performance. Many of these home consumer devices are built around ARM, PowerPC or MIPS processors running an embedded Linux operating system. The file manager informs the corresponding disk using an independent channel. Network attached storage (NAS) is a type of legacy storage or virtual storage, hosted by third-party providers as a service. Imagine a game between Tom and Sam. The key difference between direct-attached storage (DAS) and NAS is that DAS is simply an extension to an existing server and is not necessarily networked. NAS is similar to, but easier to set up than a Storage area network. IntroductionThis seemingly simple question doesn't have a simple answer. Such a "NAS" SATA hard disk drive can be used as an internal PC hard drive, without any problems or adjustments needed, as it simply supports additional options and may possibly be built to a higher quality standard (particularly if accompanied by a higher quoted MTBF figure and higher price) than a regular consumer drive. Published by SPH Magazines. Despite their differences, SAN and NAS are not mutually exclusive and may be combined as a SAN-NAS hybrid, offering both file-level protocols (NAS) and block-level protocols (SAN) from the same system. Still confused about NAS? They run Samba (an SMB daemon), NFS daemon, and FTP daemons which are freely available for those operating systems. Backup storage contains copies of the information in primary storage for use in disaster recovery situations or in other circumstances where a secondary copy is necessary. RAID 3 is a Redundant Array of Independent Disks (RAID) standard that uses striping at the byte level and stores dedicated parity bits on a separate disk drive. From Simple English Wikipedia, the free encyclopedia, https://simple.wikipedia.org/w/index.php?title=Network-attached_storage&oldid=7129383, Creative Commons Attribution/Share-Alike License. NAS units rarely limit clients to a single protocol. Also, such boxes can be built easily using a small or old computer. Patience definition, the quality of being patient, as the bearing of provocation, annoyance, misfortune, or pain, without complaint, loss of temper, irritation, or the like. The price of NAS appliances has fallen sharply in recent years, offering flexible network-based storage to the home consumer market for little more than the cost of a regular USB or FireWire external hard disk. If the client can be granted access to the file requested, the client receives the. Cover photos: Top left: In this photo, engineers led by researcher Greg Gatlin have sprayed fluorescent oil on a … Nas was married to Kelis from 2005 until they divorced in 2010. The issue with a NAS box is its drives are packed really close together and spin like crazy. In an appropriately configured RAID array, a single bad block on a single drive can be recovered completely via the redundancy encoded across the RAID set. It means that storage (like a number of hard disks) is put on a computer network, so different users can access it. When both are served over the network, NAS could have better performance than DAS, because the NAS device can be tuned precisely for file serving which is less likely to happen on a server responsible for other processing. It’s faster, less expensive and provides all the benefits of a public cloud on site, giving you complete control. Enterprise storage can be broken down into several categories. See more. A NAS often doubles as a home server for commonly shared files, such as video, photos, documents, and e-books. Developed by Cisco, the NAT process relies on a device (usually a router) to make all necessary IP address translations where the LAN meets the Internet. For example, NAS units usually do not have a keyboard or display, and are controlled and configured over the network, often using a browser.[3]. NAS backup strategies have evolved, and now the cloud is a prominent player in network-attached storage protection. Network-attached storage (NAS) is a type of dedicated file storage device that provides local-area network local area network (LAN) nodes with file-based shared storage through a standard Ethernet connection. A LUN is the identifier name for a logical volume and is the logical abstraction between a physical drive or volume and applications. Explore general methods, as well as specific products you can use for NAS backup. Also, due to its simplicity, the performance of a static volume is slightly better than other volume types. An object pronoun is a type of personal pronoun that is normally used as a grammatical object, either as the direct or indirect object of a verb, or as the object of a preposition.These pronouns always take the objective case, whether they are indirect object pronouns or … Today, boxes that already can do this are available rather cheaply. Scale-out storage is a network-attached storage ( NAS ) architecture in which the total amount of disk space can be expanded through the addition of devices in … A NAS device is a handy little box loaded with multiple hard drives in a RAID configuration to create redundant backups of your data. Such consumer market appliances are now commonly available. Some large NAS manufacturers like, Embedded system based NAS – Using an ARM or MIPS based processor architecture and a. NAS is generally not as customizable in terms of hardware (CPU, memory, storage components) or software (extensions, plug-ins, additional protocols) as a general-purpose server supplied with DAS. Clustered NAS, like a traditional one, still provides unified access to the files from any of the cluster nodes, unrelated to the actual location of the data. They can run from a virtual machine, Live CD, bootable USB flash drive (Live USB), or from one of the mounted hard drives. NAS is specialized for serving files either by its hardware, software, or configuration. Starting in the early 2000s, a series of startups emerged offering alternative solutions to single filer solutions in the form of clustered NAS – Spinnaker Networks (acquired by NetApp in February 2004), Exanet (acquired by Dell in February 2010), Gluster (acquired by RedHat in 2011), ONStor (acquired by LSI in 2009), IBRIX (acquired by HP), Isilon (acquired by EMC – November 2010), PolyServe (acquired by HP in 2007), and Panasas, to name a few. Patience definition is - the capacity, habit, or fact of being patient. This page was last changed on 1 October 2020, at 22:15. Primary storage houses the data that end users are actively accessing. The potential emerging market for NAS is the consumer market where there is a large amount of multi-media data. The way manufacturers make NAS devices can be classified into three types: NAS is useful for more than just general centralized storage provided to client computers in environments with large amounts of data. "An Introduction to Network Attached Storage", HWM magazine, Jul 2003. From the mid-1990s, NAS devices began gaining popularity as a convenient method of sharing files among multiple computers. A shared disk file system can also be run on top of a SAN to provide filesystem services. NAS is designed as an easy and self-contained solution for sharing files over the network. Network-attached storage removes the responsibility of file serving from other servers on the network. A no-strings-attached situation, which can be found on sites like BeNaughty or Zoosk, is when two people want to hook up, either once or on a regular basis, without the “strings” of commitment tying them down.Think Ashton Kutcher and Natalie Portman in the aptly named “No Strings Attached” movie. 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. She is the mother of his son. NAS uses file-based protocols such as NFS (popular on UNIX systems), SMB (Server Message Block) (used with MS Windows systems), AFP (used with Apple Macintosh computers), or NCP (used with OES and Novell NetWare). A NAS unit is a computer connected to a network that provides only file-based data storage services to other devices on the network. SAN protocols include Fibre Channel, iSCSI, ATA over Ethernet (AoE) and HyperSCSI. Everyone knows that Most of the file manager's work is offloaded to the storage disk without integrating the file system policy into the disk. What is an Object Pronoun? p. 90-92, "NETGEAR Launches First NAS-Linked Online Disaster Recovery for Consumers and SMBs", "CTERA Networks Launches, Introduces Cloud Attached Storage", Filesystems for Network-Attached Secure Disks, File server scaling with network-attached secure disks, https://en.wikipedia.org/w/index.php?title=Network-attached_storage&oldid=992744868, Articles with unsourced statements from October 2012, Creative Commons Attribution-ShareAlike License, Computer-based NAS – Using a computer (Server level or a personal computer), installs FTP/SMB/AFP... software server. 3Com and Microsoft would develop the LAN Manager software and protocol to further this new market. Network-attached storage (NAS) is a file-level (as opposed to block-level storage) computer data storage server connected to a computer network providing data access to a heterogeneous group of clients. Volumes are often confused with logical unit numbers (LUNs). A file access from the client to the disks has the following sequence: A clustered NAS is a NAS that is using a distributed file system running simultaneously on multiple servers.

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