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Network-attached storage

Network-attached storage
Network-attached storage (NAS) is file-level computer data storage connected to a computer network providing data access to a heterogeneous group of clients. NAS not only operates as a file server, but is specialized for this task either by its hardware, software, or configuration of those elements. NAS is often manufactured as a computer appliance – a specialized computer built from the ground up for storing and serving files – rather than simply a general purpose computer being used for the role.[nb 1] As of 2010[update] NAS devices are gaining popularity, as a convenient method of sharing files among multiple computers.[1] Potential benefits of network-attached storage, compared to file servers, include faster data access, easier administration, and simple configuration.[2] Note that hard drives with "NAS" in their name are functionally the same as other drives. Description[edit] A Netgear NAS NAS vs. NAS vs. Visual differentiation of NAS vs. History[edit] Implementation[edit] Uses[edit]

http://en.wikipedia.org/wiki/Network-attached_storage

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Cloud Computing vs. Virtualization EmailShareEmailShare Like the article? Cloud computing and Virtualization are both technologies that were developed to maximize the use of computing resources while reducing the cost of those resources. They are also mentioned frequently when discussing high availability and redundancy. While it is not uncommon to hear people discuss them interchangeably; they are very different approaches to solving the problem of maximizing the use of available resources. They differ in many ways and that also leads to some important considerations when selecting between the two.

NDAS (Network Direct Attached Storage) Network Direct Attached Storage (NDAS) is a proprietary storage area network system, originally marketed by the company Ximeta, for connecting external digital storage devices such as hard-disks, flash memory and tape drives via the Ethernet family of computer networks. Unlike other more common forms of networked storage, NDAS does not use TCP/IP to communicate over the network. Instead a Lean Packet Exchange (LPX) protocol is used.[1] NDAS also supports some limited RAID functions such as aggregation and mirroring.

Server (computing) A server is a system (software and suitable computer hardware) that responds to requests across a computer network to provide, or help to provide, a network service. Servers can be run on a dedicated computer, which is also often referred to as "the server", but many networked computers are capable of hosting servers. In many cases, a computer can provide several services and have several servers running. Data Center Infrastructure,Storage-Design Guide: SAN Distance Extension Using ISLs - Brocade Community Forums - 36627 Synopsis: Designs with best practices for a two-site data center disaster recovery solution using Brocade Fiber Channel ISL connections over extended distance. Contents Overview The most common reason for extending a Fibre Channel (FC) storage area network (SAN) over extended distances is to safeguard critical business data and provide near-continuous access to applications and services in the event of a localized disaster. Designing a distance extension solution involves a number of considerations, both business and technical.

SAN (Storage Area Network) A SAN does not provide file abstraction, only block-level operations. However, file systems built on top of SANs do provide file-level access, and are known as SAN filesystems or shared disk file systems. Storage[edit] Historically, data centers first created "islands" of SCSI disk arrays as direct-attached storage (DAS), each dedicated to an application, and visible as a number of "virtual hard drives" (i.e.

Data center An operation engineer overseeing a network operations control room of a data center A data center is a facility used to house computer systems and associated components, such as telecommunications and storage systems. It generally includes redundant or backup power supplies, redundant data communications connections, environmental controls (e.g., air conditioning, fire suppression) and various security devices. Large data centers are industrial scale operations using as much electricity as a small town[1] and sometimes are a significant source of air pollution in the form of diesel exhaust.[2]

What is RAID (redundant array of independent disks)? - Definition from WhatIs.com What is RAID? RAID (redundant array of independent disks; originally redundant array of inexpensive disks) is a way of storing the same data in different places (thus, redundantly) on multiple hard disks. By placing data on multiple disks, I/O (input/output) operations can overlap in a balanced way, improving performance. iSCSI In computing, iSCSI ( i/aɪˈskʌzi/ eye-SKUZ-ee) is an acronym for Internet Small Computer System Interface, an Internet Protocol (IP)-based storage networking standard for linking data storage facilities. By carrying SCSI commands over IP networks, iSCSI is used to facilitate data transfers over intranets and to manage storage over long distances. iSCSI can be used to transmit data over local area networks (LANs), wide area networks (WANs), or the Internet and can enable location-independent data storage and retrieval. Unlike traditional Fibre Channel, which usually requires dedicated cabling,[a] iSCSI can be run over long distances using existing network infrastructure.[2] iSCSI was pioneered by IBM and Cisco in 1998 and submitted as draft standard in March 2000.[3] Concepts[edit] In essence, iSCSI allows two hosts to negotiate and then exchange SCSI commands using Internet Protocol (IP) networks.

Magnetic tape data storage Sony announced in 2014 that they had developed a tape storage technology with the highest reported magnetic tape data density, 148Gb per square inch, potentially allowing tape capacity of 185TB.[1] Open reels[edit] 10.5-inch diameter reel of 9 track tape Initially, magnetic tape for data storage was wound on 10.5-inch (27 cm) reels. This defacto standard for large computer systems persisted through the late 1980s. What is tape backup? - Definition from WhatIs.com In computers, tape backup is the ability to periodically copy the contents of all or a designated amount of data from its usual storage device to a tape cartridge device so that, in the event of a hard disk crash or comparable failure, the data will not be lost. Tape backup can be done manually or, with appropriate software, be programmed to happen automatically. Tape backup systems exist for needs ranging from backing up the hard disk on a personal computer to backing up large amounts of storage for archiving and disaster recovery purposes in a large enterprise as part of a storage area network (SAN), usually combining a hardware and software package.

Fibre Channel Fibre Channel, or FC, is a high-speed network technology (commonly running at 2-, 4-, 8- and 16-gigabit per second rates) primarily used to connect computer data storage.[1][2] Fibre Channel is standardized in the T11 Technical Committee of the International Committee for Information Technology Standards (INCITS), an American National Standards Institute (ANSI)-accredited standards committee. Fibre Channel was primarily used in supercomputers, but has become a common connection type for storage area networks (SAN) in enterprise storage. Despite its name, Fibre Channel signaling can run on an electrical interface in addition to fiber-optic cables.[1][2] Fibre Channel Protocol (FCP) is a transport protocol (similar to TCP used in IP networks) that predominantly transports SCSI commands over Fibre Channel networks.[1][2] The origin of the name[edit]

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