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Storage hardware

Terms related to storage hardware, including definitions about solid state drives and words and phrases about hard disk drives, tape drives, disk arrays and tiered storage.

3D - P/E

  • 3D NAND flash - 3D NAND is a type of non-volatile flash memory in which the memory cells are stacked vertically in multiple layers.
  • 3D XPoint - 3D XPoint is memory storage technology jointly developed by Intel and Micron Technology Inc.
  • 8-track tape - An 8-track tape is a hard plastic cartridge about the size of an external modem that houses a continuous loop of non-digital (analog) audio data stored on magnetic tape.
  • ADPCM (adaptive differential pulse-code modulation) - ADPCM (adaptive differential pulse-code modulation) is a technique for converting sound or analog information to binary information (a string of 0's and 1's) by taking frequent samples of the sound and expressing the value of the sampled sound modulation in binary terms.
  • all-flash array (AFA) - An all-flash array (AFA), also known as a solid-state storage disk system or a solid-state array, is an external storage array that uses only flash media for persistent storage.
  • application-aware storage - Application-aware storage is a storage system with built-in intelligence about relevant applications and their utilization patterns.
  • backup storage device - A backup storage device is used to make copies of data that is actively in use.
  • bit (binary digit) - A bit (short for binary digit) is the smallest unit of data in a computer.
  • burn-in - Burn-in is a test in which a system or component is made to run for an extended period of time to detect problems.
  • cache algorithm - A cache algorithm is a detailed list of instructions that decides which items should be discarded in a computer's cache of information.
  • CD-ROM - .
  • CDMA (Code-Division Multiple Access) - CDMA (Code-Division Multiple Access) refers to any of several protocols used in second-generation (2G) and third-generation (3G) wireless communications.
  • Cisco HyperFlex - HyperFlex systems combine software-defined storage and data services software with Cisco UCS (unified computing system), a converged infrastructure system that integrates computing, networking and storage resources to increase efficiency and enable centralized management.
  • client solid state drive (SSD) - Client solid state drive (SSD) is a marketing term used by original equipment manufacturers (OEMs) and value-added resellers (VARs) to differentiate between solid state drives built for consumers and solid state drives built for the enterprise.
  • cloud storage gateway - A cloud storage gateway is a hardware- or software-based appliance that serves as a bridge between local applications and remote cloud-based storage.
  • cluster quorum disk - A cluster quorum disk is the storage medium on which the configuration database is stored for a cluster computing network.
  • clustered network-attached storage (clustered NAS) - A clustered NAS system is a distributed file system that runs concurrently on multiple NAS nodes.
  • commodity - A commodity is a type of widely-available product that is not markedly dissimilar from one unit to another.
  • commodity hardware - Commodity hardware, in an IT context, is a device or device component that is relatively inexpensive, widely available and more or less interchangeable with other hardware of its type.
  • compact disc (CD) - A compact disc is a portable storage medium that can be used for recording, storing and playing back audio, video and other data in digital form.
  • CompactFlash card (CF card) - A CompactFlash card (CF card) is a memory card format developed by SanDisk in 1994 that uses flash memory technology to store data on a very small portable device.
  • conventional memory - DOS memory, sometimes referred to as conventional memory, refers to the memory -addressing scheme used in the original IBM and compatible PCs.
  • converged infrastructure reference architecture - A converged infrastructure reference architecture is a document that stipulates the components, design and configuration a CI appliance, which includes storage, compute and networking resources within a single-box system.
  • converged secondary storage - Converged secondary storage is a combination of common data protection elements and non-primary storage tasks into one platform.
  • DASD (direct access storage device) - Direct access storage device (DASD, pronounced DAZ-dee), is a general term for magnetic disk storage devices.
  • data center capacity planning - Data center capacity planning ensures that an IT organization has enough facility space, power and computing resources to support average and peak workloads.
  • Dell EMC - Dell EMC is an American multinational technology company that offers products and services across all areas of computing, networking and storage.
  • Digital Data Storage (DDS, DDS-1, DDS-2, DDS-3, DDS-4) - Digital Data Storage (DDS) is a format for storing and backing up computer data on tape that evolved from the Digital Audio Tape (DAT) technology.
  • disk cache - A disk cache is a mechanism for improving the time it takes to read from or write to a hard disk.
  • disk cloning - Disk cloning is the act of copying the contents of a computer's hard drive.
  • disk image - A disk image is a copy of the entire contents of a storage device, such as a hard drive, DVD, or CD.
  • diskette (floppy disk) - A diskette is a random access, removable data storage medium that can be used with personal computers.
  • DLT (digital linear tape) - Before the popular Linear Tape-Open Consortium came into existence, Quantum had its proprietary digital linear tape (DLT) format.
  • DRBD (Distributed Replicated Block Device) - DRBD (Distributed Replicated Block Device) is a Linux-based software component that facilitates the replacement of shared storage systems by networked mirroring.
  • DVD (digital video disk) - DVD is an optical disc technology with a 4.
  • EBCDIC (Extended Binary Coded Decimal Interchange Code)  - EBCDIC (Extended Binary Coded Decimal Interchange Code ) (pronounced either "ehb-suh-dik" or "ehb-kuh-dik") is a binary code for alphabetic and numeric characters that IBM developed for its larger operating systems.
  • ECOphlex (PHase-change Liquid EXchange) - ECOphlex (PHase-change Liquid EXchange) is an efficient and environmentally-friendly computer component cooling technology.
  • EEPROM (electrically erasable programmable read-only memory) - EEPROM (electrically erasable programmable read-only memory) is user-modifiable read-only memory (ROM) that can be erased and reprogrammed (written to) repeatedly through the application of higher than normal electrical voltage.
  • enterprise MLC (eMLC) - Enterprise MLC (eMLC) is a type of MLC flash that has been enhanced to accommodate more write cycles than consumer-grade MLC flash offers.
  • enterprise SSD (enterprise solid-state drive) - An enterprise SSD (also known as an enterprise solid-state drive or enterprise solid-state disk) stores data persistently or caches data temporarily in nonvolatile memory and generally provides higher performance and greater endurance than consumer or client SSDs.
  • EPROM - EPROM (erasable programmable read-only memory) is programmable read-only memory (programmable ROM) that can be erased and re-used.
  • ESDRAM (Enhanced Synchronous DRAM) - ESDRAM (Enhanced Synchronous DRAM), made by Enhanced Memory Systems, includes a small static RAM in the SDRAM chip.
  • failover cluster - A failover cluster is a group of servers that work together to maintain high availability of applications and services.
  • fan-out ratio - A fan-out ratio is the relationship in quantity between a single port on a storage device and the number of servers that are attached to it.
  • FDISK - WARNING: Use caution when repartitioning a hard disk drive that contains data.
  • Fibre Channel port names - Fibre Channel port names.
  • Flash - Flash, a popular authoring software developed by Macromedia, is used to create vector graphics-based animation programs with full-screen navigation interfaces, graphic illustrations, and simple interactivity in an antialiased, resizable file format that is small enough to stream across a normal modem connection.
  • flash controller (flash memory controller) - A flash controller is the part of solid-state flash memory that communicates with the host device and manages the flash file system directory.
  • flash file system - Flash file systems are designed specifically for memory devices.
  • flash memory - Flash memory, also known as flash storage, is a type of nonvolatile memory that erases data in units called blocks.
  • flash storage - Flash storage is any type of drive, repository or system that uses flash memory to keep data for an extended period of time.
  • flash-based solid state drive (SSD) - A flash solid state drive (SSD)  is a non-volatile storage device that stores persistent data in flash memory.
  • floating gate transistor (FGT) - A floating gate transistor (FGT) is a complementary metal-oxide semiconductor (CMOS) technology capable of holding an electrical charge in a memory device that is used to store data.
  • green cloud - Green cloud is a label that describes the potential environmental benefits that information technology services delivered over the Internet can offer society.
  • green networking - Green networking is the practice of selecting energy-efficient networking technologies and products, and minimizing resource use whenever possible.
  • green storage - Green storage is the practice of using a variety of "clean energy" storage methods and products to cut down on a data center's carbon footprint, as well as cost.
  • Gridstore HyperConverged Appliance (HCA) - Gridstore HyperConverged Appliance (HCA) is an all-flash storage device that includes compute, virtualization and networking resources.
  • hard disk - A hard disk is part of a unit -- often called a disk drive, hard drive or hard disk drive -- that stores and provides relatively quick access to large amounts of data on an electromagnetically charged surface or set of surfaces.
  • hard disk drive (HDD) - A computer hard disk drive (HDD) is a non-volatile memory hardware device that controls the positioning, reading and writing of the hard disk, which furnishes data storage.
  • HD-DVD (high-density DVD) - HD-DVD (high-density DVD) is an optical digital storage medium with a capacity that far exceeds that of standard DVD media.
  • Heartbeat - Heartbeat is a program that runs specialized scripts automatically whenever a system is initialized or rebooted.
  • high availability (HA) - High availability (HA) is the ability of a system to operate continuously without failing for a designated period of time.
  • holographic storage (holostorage) - Holographic storage is computer storage that uses laser beams to store computer-generated data in three dimensions.
  • hot plugging - Hot plugging is the addition of a component to a running computer system without significant interruption to the operation of the system.
  • hybrid database - A hybrid database is a type of real-time database system that uses both on-disk and in-memory data storage by deciding which is most suitable for a given task.
  • hybrid flash array - A hybrid flash array is a solid-state storage system that contains a mix of flash memory drives and hard disk drives.
  • hybrid hard drive (HHD) - A hybrid hard drive (HHD), sometimes known as a solid-state hybrid drive (SSHD), is a mass storage device that combines a conventional hard disk drive and a NAND flash module.
  • hyper-converged appliance - A hyper-converged appliance is a hardware device that provides multiple data center management technologies within a single box.
  • I/O fencing (input/output fencing) - I/O (input/output) fencing is the isolation of a malfunctioning node from a cluster's shared storage to protect the integrity of data.
  • IDE (Integrated Drive Electronics) - IDE (Integrated Drive Electronics) is an electronic interface standard that defines the connection between a bus on a computer's motherboard and the computer's disk storage devices.
  • IOPS (input/output operations per second) - IOPS measures the maximum number of reads and writes to non-contiguous storage.
  • iSCSI switch (Internet Small Computer System Interface switch) - An iSCSI switch is an appliance that processes and channels data between an iSCSI initiator and target on a storage device.
  • JEDEC - JEDEC is a global industry group that develops open standards for microelectronics.
  • LCD (Liquid Crystal Display) - LCD (Liquid Crystal Display) is a type of flat panel display which uses liquid crystals in its primary form of operation.
  • Lenovo Converged HX series - HX hyper-converged infrastructure appliances are designed for virtual desktop infrastructure (VDI), server virtualization, private and hybrid clouds, enterprise applications and remote/branch office (ROBO) environments.
  • LTO-5 - LTO-5 is a tape format released in 2010 by the Linear Tape-Open Consortium.
  • M.2 SSD - An M.2 SSD is a small form factor solid-state drive (SSD) that is used in internally mounted storage expansion cards.
  • magnetic storage - Magnetic storage has been around in many forms since 1888 by Oberlan Smith, who publicized his audio recording on a wire in Electrical World.
  • MDRAM (Multibank Dynamic RAM) - Multibank Dynamic RAM (MDRAM) is a type of video RAM, developed by MoSys, that divides memory into multiple 32 kilobyte parts or "banks" that can be accessed individually.
  • memory - Memory is the electronic holding place for the instructions and data a computer needs to reach quickly.
  • memory mirroring - Memory mirroring is the division of memory on a server into two channels.
  • mount point - Whether it comes from a partition on the same drive, a new hard drive, media inserted into an optical drive or some form of flash memory, any file system must be mounted before it can be displayed and its file system read.
  • multi-level cell (MLC) - Multi-level cell flash is a type of NAND flash memory that can store more than 1 bit per cell.
  • Multi-Root IOV (MR-IOV) - Multi-Root IOV (MR-IOV).
  • NAND flash memory - NAND flash memory is a type of non-volatile storage technology that does not require power to retain data.
  • NAND flash wear-out - NAND flash wear-out is the breakdown of the oxide layer within the floating-gate transistors of NAND flash memory.
  • NAS Appliance - NAS appliances are commodity hardware that includes their own dedicated storage disks and RAID that can easily scale as more capacity is needed.
  • NAS filer (network-attached storage filer) - NAS filers add scalable, expandable storage for file-serving purposes in data sharing, cloud applications, Internet and enterprise networks, in both Fibre Channel SANs and Ethernet LANs.
  • nearline storage - Nearline storage is the on-site storage of data on removable media.
  • network-attached storage (NAS) - Network-attached storage (NAS) is dedicated file storage that enables multiple users and heterogeneous client devices to retrieve data from centralized disk capacity.
  • Nimboxx Inc. - Nimboxx Inc.
  • non-volatile storage (NVS) - Non-volatile storage (NVS) is a broad collection of technologies and devices that do not require a continuous power supply to retain data or program code persistently on a short- or long-term basis.
  • NOR flash memory - NOR flash memory is one of two types of non-volatile storage technologies.
  • ODX (Offloaded Data Transfer) - Offloaded Data Transfer (ODX) is a feature in Microsoft Windows Server 2012 that speeds up copy and move operations by allowing them to be performed by the storage hardware rather than the operating system.
  • optical disk - An optical disk is an electronic data storage medium that can be written to and read from using a low-powered laser beam.
  • optical storage - Optical storage is any storage type in which data is written and read with a laser.
  • overprovisioning (SSD overprovisioning) - Overprovisioning, in a storage context, is the inclusion of extra storage capacity in a flash solid state drive (SSD).
  • oversubscription - Oversubscription, in a SAN (storage area network) switching environment, is the practice of connecting multiple devices to the same switch port to optimize switch use.
  • P/E cycle - A solid-state-storage program-erase cycle is a sequence of events in which data is written to solid-state NAND flash memory cell (such as the type found in a so-called flash or thumb drive), then erased, and then rewritten.
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