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Index RAID

RAID (Redundant Array of Independent Disks, originally Redundant Array of Inexpensive Disks) is a data storage virtualization technology that combines multiple physical disk drive components into one or more logical units for the purposes of data redundancy, performance improvement, or both. [1]

95 relations: Adaptec, Apache Hadoop, Availability, BeeGFS, Bit, Booting, Btrfs, Byte, Cache (computing), Computer hardware, Computer performance, Concurrency (computer science), CRC Press, Data redundancy, Data scrubbing, Data striping, DataVault, David Patterson (computer scientist), Digital Equipment Corporation, Disk mirroring, Disk sector, Disk storage, Error recovery control, Exclusive or, Exponential distribution, Fault tolerance, Features new to Windows 8, Fibre Channel, File system, Finite field, FreeBSD, Garth Gibson, GEOM, Hamming code, Hans Peter Anvin, Hard disk drive performance characteristics, Hewlett-Packard, IBM, IBM Spectrum Scale, Illumos, Intel Matrix RAID, Jim Gray (computer scientist), Kernel (operating system), Linux, Linux kernel, Logical volume management, Logical Volume Manager (Linux), MacOS, MacOS Server, Mainframe computer, ..., Mdadm, Mean time between failures, Microsoft, Nested RAID levels, NetApp, NetBSD, Network-attached storage, Non-RAID drive architectures, Non-standard RAID levels, Non-volatile memory, OpenBSD, OpenVMS, OpenZFS, Operating system, Oracle Corporation, Parity bit, Personal computer, Proprietary software, Randy Katz, Redundancy (engineering), Redundant array of independent memory, Reed–Solomon error correction, Reliability engineering, S.M.A.R.T., SCSI, Serial Attached SCSI, SIGMOD, Smartmontools, Software, Solaris (operating system), Solid-state drive, Stack Exchange, Storage Networking Industry Association, Storage virtualization, Thinking Machines Corporation, Throughput, University of California, Berkeley, Veritas File System, Virtualization, Windows 8, Windows Server 2012, Write-ahead logging, XFS, ZDNet, ZFS. Expand index (45 more) »


Adaptec was a computer storage company and remains a brand for computer storage products.

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Apache Hadoop

Apache Hadoop is a collection of open-source software utilities that facilitate using a network of many computers to solve problems involving massive amounts of data and computation.

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In reliability theory and reliability engineering, the term availability has the following meanings.

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BeeGFS is a parallel file system, developed and optimized for high-performance computing.

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The bit (a portmanteau of binary digit) is a basic unit of information used in computing and digital communications.

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In computing, booting is starting up a computer or computer appliance until it can be used.

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Btrfs (pronounced as "butter fuss", "better F S", "butter F S", "b-tree F S", or simply by spelling it out) is a file system based on the copy-on-write (COW) principle, initially designed at Oracle Corporation for use in Linux.

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The byte is a unit of digital information that most commonly consists of eight bits, representing a binary number.

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Cache (computing)

In computing, a cache, is a hardware or software component that stores data so future requests for that data can be served faster; the data stored in a cache might be the result of an earlier computation, or the duplicate of data stored elsewhere.

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Computer hardware

Computer hardware includes the physical parts or components of a computer, such as the central processing unit, monitor, keyboard, computer data storage, graphic card, sound card and motherboard.

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Computer performance

Computer performance is the amount of work accomplished by a computer system.

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Concurrency (computer science)

In computer science, concurrency refers to the ability of different parts or units of a program, algorithm, or problem to be executed out-of-order or in partial order, without affecting the final outcome.

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CRC Press

The CRC Press, LLC is a publishing group based in the United States that specializes in producing technical books.

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Data redundancy

In computer main memory, auxiliary storage and computer buses, data redundancy is the existence of data that is additional to the actual data and permits correction of errors in stored or transmitted data.

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Data scrubbing

Data scrubbing is an error correction technique that uses a background task to periodically inspect main memory or storage for errors, then correct detected errors using redundant data in the form of different checksums or copies of data.

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Data striping

In computer data storage, data striping is the technique of segmenting logically sequential data, such as a file, so that consecutive segments are stored on different physical storage devices.

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The DataVault was Thinking Machines' mass storage system.

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David Patterson (computer scientist)

David Andrew Patterson (born November 16, 1947) is an American computer pioneer and academic who has held the position of Professor of Computer Science at the University of California, Berkeley since 1976.

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Digital Equipment Corporation

Digital Equipment Corporation, also known as DEC and using the trademark Digital, was a major American company in the computer industry from the 1950s to the 1990s.

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Disk mirroring

In data storage, disk mirroring is the replication of logical disk volumes onto separate physical hard disks in real time to ensure continuous availability.

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Disk sector

In computer disk storage, a sector is a subdivision of a track on a magnetic disk or optical disc.

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Disk storage

Disk storage (also sometimes called drive storage) is a general category of storage mechanisms where data is recorded by various electronic, magnetic, optical, or mechanical changes to a surface layer of one or more rotating disks.

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Error recovery control

In computing, error recovery control (ERC) (Western Digital: time-limited error recovery (TLER), Samsung/Hitachi: command completion time limit (CCTL)) is a feature of hard disks which allow a system administrator to configure the amount of time a drive's firmware is allowed to spend recovering from a read or write error.

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Exclusive or

Exclusive or or exclusive disjunction is a logical operation that outputs true only when inputs differ (one is true, the other is false).

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Exponential distribution

No description.

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Fault tolerance

Fault tolerance is the property that enables a system to continue operating properly in the event of the failure (or one or more faults within) some of its components.

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Features new to Windows 8

The transition from Windows 7 to Windows 8 introduced a number of new features across various aspects of the operating system.

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Fibre Channel

Fibre Channel, or FC, is a high-speed network technology (commonly running at 1, 2, 4, 8, 16, 32, and 128 gigabit per second rates) providing in-order, lossless delivery of raw block data, primarily used to connect computer data storage to servers.

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File system

In computing, a file system or filesystem controls how data is stored and retrieved.

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Finite field

In mathematics, a finite field or Galois field (so-named in honor of Évariste Galois) is a field that contains a finite number of elements.

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FreeBSD is a free and open-source Unix-like operating system descended from Research Unix via the Berkeley Software Distribution (BSD).

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Garth Gibson

Garth Alan Gibson is a Computer Scientist from Carnegie Mellon University.

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GEOM is the main storage framework for the FreeBSD operating system.

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Hamming code

In telecommunication, Hamming codes are a family of linear error-correcting codes.

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Hans Peter Anvin

Hans Peter Anvin, known as H. Peter Anvin, or simply Peter Anvin, or even hpa (born 1972), is a Swedish computer programmer who has distinguished himself by his contributions to Free and open source software projects.

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Hard disk drive performance characteristics

Higher performance in hard disk drives comes from devices which have better performance characteristics.

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The Hewlett-Packard Company (commonly referred to as HP) or shortened to Hewlett-Packard was an American multinational information technology company headquartered in Palo Alto, California.

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The International Business Machines Corporation (IBM) is an American multinational technology company headquartered in Armonk, New York, United States, with operations in over 170 countries.

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IBM Spectrum Scale

IBM Spectrum Scale is a high-performance clustered file system developed by IBM.

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illumos is a free and open-source Unix operating system.

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Intel Matrix RAID

Matrix RAID is a computer storage technology marketed by Intel.

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Jim Gray (computer scientist)

James Nicholas Gray (19442007) was an American computer scientist who received the Turing Award in 1998 "for seminal contributions to database and transaction processing research and technical leadership in system implementation".

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Kernel (operating system)

The kernel is a computer program that is the core of a computer's operating system, with complete control over everything in the system.

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Linux is a family of free and open-source software operating systems built around the Linux kernel.

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Linux kernel

The Linux kernel is an open-source monolithic Unix-like computer operating system kernel.

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Logical volume management

In computer storage, logical volume management or LVM provides a method of allocating space on mass-storage devices that is more flexible than conventional partitioning schemes to store volumes.

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Logical Volume Manager (Linux)

In Linux, Logical Volume Manager (LVM) is a device mapper target that provides logical volume management for the Linux kernel.

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macOS (previously and later) is a series of graphical operating systems developed and marketed by Apple Inc. since 2001.

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MacOS Server

macOS Server, formerly Mac OS X Server and OS X Server, is a separately sold operating system add-on which provides additional server programs along with management and administration tools for macOS.

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Mainframe computer

Mainframe computers (colloquially referred to as "big iron") are computers used primarily by large organizations for critical applications; bulk data processing, such as census, industry and consumer statistics, enterprise resource planning; and transaction processing.

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mdadm is a GNU/Linux utility used to manage and monitor software RAID devices.

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Mean time between failures

Mean time between failures (MTBF) is the predicted elapsed time between inherent failures of a mechanical or electronic system, during normal system operation.

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Microsoft Corporation (abbreviated as MS) is an American multinational technology company with headquarters in Redmond, Washington.

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Nested RAID levels

Nested RAID levels, also known as hybrid RAID, combine two or more of the standard RAID levels (where "RAID" stands for "redundant array of independent disks") to gain performance, additional redundancy or both, as a result of combining properties of different standard RAID layouts.

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NetApp, Inc. is a hybrid cloud data services company headquartered in Sunnyvale, California.

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NetBSD is a free and open source Unix-like operating system that descends from Berkeley Software Distribution (BSD), a Research Unix derivative developed at the University of California, Berkeley.

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Network-attached storage

Network-attached storage (NAS) is a file-level computer data storage server connected to a computer network providing data access to a heterogeneous group of clients.

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Non-RAID drive architectures

The most widespread standard for configuring multiple hard disk drives is RAID (Redundant Array of Inexpensive/Independent Disks), which comes in a number of standard configurations and non-standard configurations.

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Non-standard RAID levels

Although all RAID implementations differ from the specification to some extent, some companies and open-source projects have developed non-standard RAID implementations that differ substantially from the standard.

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Non-volatile memory

Non-volatile memory (NVM) or non-volatile storage is a type of computer memory that can retrieve stored information even after having been power cycled.

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OpenBSD is a free and open-source Unix-like computer operating system descended from Berkeley Software Distribution (BSD), a Research Unix derivative developed at the University of California, Berkeley.

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OpenVMS is a closed-source, proprietary computer operating system for use in general-purpose computing.

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OpenZFS is an umbrella project aimed at bringing together individuals and companies that use the ZFS file system and work on its improvements, aiming as well at making ZFS more widely used and developed in a true open-source manner.

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Operating system

An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs.

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Oracle Corporation

Oracle Corporation is an American multinational computer technology corporation, headquartered in Redwood Shores, California.

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Parity bit

A parity bit, or check bit, is a bit added to a string of binary code to ensure that the total number of 1-bits in the string is even or odd.

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Personal computer

A personal computer (PC) is a multi-purpose computer whose size, capabilities, and price make it feasible for individual use.

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Proprietary software

Proprietary software is non-free computer software for which the software's publisher or another person retains intellectual property rights—usually copyright of the source code, but sometimes patent rights.

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Randy Katz

Randy Howard Katz is a distinguished professor at University of California, Berkeley of the electrical engineering and computer science department.

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Redundancy (engineering)

In engineering, redundancy is the duplication of critical components or functions of a system with the intention of increasing reliability of the system, usually in the form of a backup or fail-safe, or to improve actual system performance, such as in the case of GNSS receivers, or multi-threaded computer processing.

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Redundant array of independent memory

A redundant array of independent memory (RAIM) is a design feature found in certain computers' main random access memory.

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Reed–Solomon error correction

Reed–Solomon codes are a group of error-correcting codes that were introduced by Irving S. Reed and Gustave Solomon in 1960.

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Reliability engineering

Reliability engineering is a sub-discipline of systems engineering that emphasizes dependability in the lifecycle management of a product.

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S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology; often written as SMART) is a monitoring system included in computer hard disk drives (HDDs), solid-state drives (SSDs), and eMMC drives.

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Small Computer System Interface (SCSI) is a set of standards for physically connecting and transferring data between computers and peripheral devices.

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Serial Attached SCSI

In computing, Serial Attached SCSI (SAS) is a point-to-point serial protocol that moves data to and from computer-storage devices such as hard drives and tape drives.

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SIGMOD is the Association for Computing Machinery's Special Interest Group on Management of Data, which specializes in large-scale data management problems and databases.

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Smartmontools (S.M.A.R.T. Monitoring Tools) is a set of utility programs (smartctl and smartd) to control and monitor computer storage systems using the Self-Monitoring, Analysis and Reporting Technology (S.M.A.R.T.) system built into most modern (P)ATA, Serial ATA, SCSI/SAS and NVMe hard drives.

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Computer software, or simply software, is a generic term that refers to a collection of data or computer instructions that tell the computer how to work, in contrast to the physical hardware from which the system is built, that actually performs the work.

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Solaris (operating system)

Solaris is a Unix operating system originally developed by Sun Microsystems.

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Solid-state drive

A solid-state drive (SSD) is a solid-state storage device that uses integrated circuit assemblies as memory to store data persistently.

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Stack Exchange

Stack Exchange is a network of question-and-answer (Q&A) websites on topics in varied fields, each site covering a specific topic, where questions, answers, and users are subject to a reputation award process.

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Storage Networking Industry Association

The Storage Networking Industry Association (SNIA) is an association of producers and consumers of computer data storage networking products.

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Storage virtualization

In computer science, storage virtualization is "the process of presenting a logical view of the physical storage resources to" a host computer system, "Treating all storage media (hard disk, optical disk, tape, etc.) in the enterprise as a single pool of storage." A "storage system" is also known as a storage array, disk array, or filer.

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Thinking Machines Corporation

Thinking Machines Corporation was a supercomputer manufacturer and Artificial Intelligence company,founded in Waltham, Massachusetts, in 1983 by Sheryl Handler and W. Daniel "Danny" Hillis to turn Hillis's doctoral work at MIT on massively parallel computing architectures into a commercial product known as the Connection Machine.

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In general terms, throughput is the maximum rate of production or the maximum rate at which something can be processed.

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University of California, Berkeley

The University of California, Berkeley (UC Berkeley, Berkeley, Cal, or California) is a public research university in Berkeley, California.

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Veritas File System

The VERITAS File System (or VxFS; called JFS and OnlineJFS in HP-UX) is an extent-based file system.

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In computing, virtualization refers to the act of creating a virtual (rather than actual) version of something, including virtual computer hardware platforms, storage devices, and computer network resources.

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Windows 8

Windows 8 is a personal computer operating system developed by Microsoft as part of the Windows NT family of operating systems.

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Windows Server 2012

Windows Server 2012, codenamed "Windows Server 8", is the sixth release of Windows Server.

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Write-ahead logging

In computer science, write-ahead logging (WAL) is a family of techniques for providing atomicity and durability (two of the ACID properties) in database systems.

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XFS is a high-performance 64-bit journaling file system created by Silicon Graphics, Inc (SGI) in 1993.

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ZDNet is a business technology news website published by CBS Interactive, along with TechRepublic.

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ZFS is a combined file system and logical volume manager designed by Sun Microsystems and now owned by Oracle Corporation.

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[1] https://en.wikipedia.org/wiki/RAID

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