Storage architecture

Definitions about storage and data management including backup/recovery vocabulary, business intelligence terminology, storage area networks and database management.

ISC - VIR

iSCSI (Internet Small Computer System Interface) - ISCSI is a transport layer protocol that describes how Small Computer System Interface (SCSI) packets should be transported over a TCP/IP network.
iSCSI initiator - An iSCSI initiator is software or hardware that enables a host computer to transmit data to an iSCSI-based storage array through a network adapter over a TCP-based IP network.
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.
iSCSI target (Internet Small Computer System Interface target) - ISCSI target is a storage option in an Internet Small Computer System Interface server that manages connections between servers that need access to the targets and the iSCSI storage subsystem in a storage area network.
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.
LOB (line of business) - An LOB (line-of-business) application is one of the set of critical computer applications that are vital to running an enterprise, such as accounting, supply chain management, and resource planning applications.
logical unit number (LUN) - A logical unit number (LUN) is a unique identifier for designating an individual or collection of physical or virtual storage devices that execute input/output (I/O) commands with a host computer, as defined by the Small System Computer Interface (SCSI) standard.
lossless and lossy compression - Lossless and lossy file compression describe whether all original data can be recovered when the file is uncompressed.
LTO-5 - LTO-5 is a tape format released in 2010 by the Linear Tape-Open Consortium.
LUN masking - LUN masking is an authorization mechanism used in storage area networks (SANs) to make LUNs available to some hosts but unavailable to other hosts.
LZW compression - LZW compression is a method to reduce the size of Tag Image File Format (TIFF) or Graphics Interchange Format (GIF) files.
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.
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.
metadata - Often referred to as data that describes other data, metadata is structured reference data that helps to sort and identify attributes of the information it describes.
Microsoft iSCSI Initiator - Microsoft iSCSI Initiator is a tool that connects external iSCSI-based storage to host computers with an Ethernet network adapter.
mSATA SSD (mSATA solid-state drive) - An mSATA SSD is a solid-state drive (SSD) that conforms to the mSATA interface specification developed by the Serial ATA (SATA) International Organization.
multi-level cell (MLC) - Multi-level cell flash is a type of NAND flash memory that can store more than 1 bit per cell.
Multipath I/O (MPIO) - Multipath I/O (MPIO) is a Microsoft framework designed to mitigate the effects of a host bus adapter (HBA) failure by providing an alternate data path between storage network devices.
multipathing (SAN multipathing) - Multipathing, also called SAN multipathing or I/O multipathing, is the establishment of multiple physical routes between a server and the storage device that supports it.
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 enclosure (network-attached storage enclosure) - NAS enclosures provide shared storage to all users connected to a network, and vary in models appropriate for home offices to enterprises.
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.
NAS gateway - NAS gateway is a NAS (network-attached storage) system in which the storage media are externally attached, typically over a Fibre Channel interface.
nearline storage - Nearline storage is the on-site storage of data on removable media.
NetApp SolidFire - NetApp SolidFire is a business division of NetApp Inc.
Network Data Management Protocol (NDMP) - Network Data Management Protocol (NDMP) is an open protocol to control data backup and recovery communications between primary and secondary storage in a heterogeneous network environment.
Network File System (NFS) - Network File System (NFS) is a networking protocol for distributed file sharing.
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.
NTFS (NT File System) - NTFS, which stands for 'NT file system' and the 'New Technology File System,' is the file system that the Windows NT operating system (OS) uses for storing and retrieving files on hard disk drives (HDDs) and solid-state drives (SSDs).
NVDIMM (Non-Volatile Dual In-line Memory Module) - An NVDIMM (non-volatile dual in-line memory module) is hybrid computer memory that retains data during a service outage.
NVMe over Fabrics (NVMe-oF) - NVMe over Fabrics, also known as NVMe-oF and non-volatile memory express over fabrics, is a protocol specification designed to connect hosts to storage across a network fabric using the NVMe protocol.
NVMe over Fibre Channel (NVMe over FC) or FC-NVMe standard - Nonvolatile memory express over Fibre Channel (NVMe over FC) -- which is implemented through the Fibre Channel-NVMe (FC-NVMe) standard -- is a technology specification designed to enable NVMe-based message commands to transfer data and status information between a host computer and a target storage subsystem over a Fibre Channel network fabric.
Opex (operational expenditure) - Opex (operational expenditure) is the money a company or organization spends on an ongoing, day-to-day basis to run its business.
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 solid-state drive.
oversubscription - Oversubscription in a storage area network (SAN) is the practice of committing more network bandwidth to devices connected to that network than what is physically available.
PCIe SSD (PCIe solid-state drive) - A PCIe SSD (PCIe solid-state drive) is a high-speed expansion card that attaches a computer to its peripherals.
primary storage (main storage) - Primary storage is the collective methods and technologies used to capture and retain digital information that is in active use and critical for an organization’s operations.
program/erase cycle (P/E cycle) - A solid-state storage program/erase cycle (P/E cycle) is a sequence of events in which data is written to a solid-state NAND flash memory cell, such as the type found in a flash or thumb drive, and is subsequently erased and rewritten.
Pure Storage - Pure Storage is a provider of enterprise data flash storage solutions designed to substitute for electromechanical disk arrays.
QLC NAND - QLC NAND (quad-level cell NAND) is a form of NAND flash memory that can store up to four bits of data per memory cell.
QNAP Systems Inc. (Quality Network Appliance Provider Systems Inc.) - QNAP Systems Inc.
queue depth - Queue depth, in storage, is the number of pending input/output (I/O) requests that a storage resource can handle at any one time.
Qumulo - Qumulo is a Seattle-based storage vendor that specializes in selling its data-aware storage software application called the Qumulo Core.
RAIN (redundant/reliable array of inexpensive/independent nodes) - A reliable array of independent nodes (RAIN) is a heterogeneous cluster of compute and storage nodes connected in a fault-tolerant network topology that incorporates multiple interfaces and redundant hardware.
RAM-based solid-state drive (SSD) - A RAM-based solid-state drive (SSD) is a storage device made from silicon microchips that has no moving parts and stores data electronically instead of magnetically.
read-intensive SSD (read-intensive solid-state drive) - A read-intensive solid-state drive (SSD) is a NAND flash-based storage or caching device used with applications that write data infrequently, in contrast to SSDs that target write-intensive workloads.
read-only memory (ROM) - Read-only memory, or ROM, is a type of computer storage containing non-volatile, permanent data that, normally, can only be read, not written to.
redundancy - Redundancy is a system design in which a component is duplicated so if it fails there will be a backup.
Remote Direct Memory Access (RDMA) - Remote Direct Memory Access (RDMA) is a technology that enables two networked computers to exchange data in main memory without relying on the processor, cache or operating system of either computer.
removable media - Removable media is any type of storage device that can be removed from a computer while the system is running.
RRAM or ReRAM (resistive RAM) - RRAM or ReRAM (resistive random access memory) is a form of nonvolatile storage that operates by changing the resistance of a specially formulated solid dielectric material.
SAS SSD (Serial-Attached SCSI solid-state drive) - A SAS SSD (Serial-Attached SCSI solid-state drive) is a NAND flash-based storage or caching device designed to fit in the same slot as a hard disk drive (HDD) and use the SAS interface to connect to the host computer.
SATA controller - A SATA controller handles how hard drives are connected to a computer's motherboard.
scale-out storage - 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 connected arrays with their own resources.
SCSI (Small Computer System Interface) - Definition: The Small Computer System Interface (SCSI) is a set of parallel interface standards used to attach disk drives and other peripherals to a computer.
SCSI controller (Small Computer System Interface controller) - A SCSI controller, also called a host bus adapter (HBA), is a card or chip that allows a SCSI storage device to communicate with the operating system across a SCSI bus.
SDRAM (synchronous DRAM) - SDRAM (synchronous DRAM) is a generic name for various kinds of dynamic random access memory (DRAM) that are synchronized with the clock speed that the microprocessor is optimized for.
secondary storage - Secondary storage is persistent storage for noncritical data that doesn't need to be accessed as frequently as data in primary storage or that doesn't have the same performance or availability requirements.
Seebeck effect - The Seebeck effect is a phenomenon in which a temperature difference between two dissimilar electrical conductors or semiconductors produces a voltage difference between the two substances.
semiconductor fab - A semiconductor fab is a manufacturing plant in which raw silicon wafers are turned into integrated circuits.
Serial ATA (Serial Advanced Technology Attachment or SATA) - Serial ATA (Serial Advanced Technology Attachment or SATA) is a command and transport protocol that defines how data is transferred between a computer's motherboard and mass storage devices, such as hard disk drives (HDDs), optical drives and solid-state drives (SSDs).
Serial-Attached SCSI (SAS) - Serial-Attached SCSI (SAS) is a method used to access computer peripheral devices that employs a serial -- one bit at a time -- means of digital data transfer over thin cables.
Server Message Block protocol (SMB protocol) - The Server Message Block protocol (SMB protocol) is a client-server communication protocol used for sharing access to files, printers, serial ports and other resources on a network.
single-level cell (SLC) flash - Single-level cell (SLC) flash is a type of solid-state storage that stores one bit of data per cell of flash media.
solid-state - Solid-state is a common descriptor used to refer to electronic components, devices and systems based entirely on semiconductor materials such as silicon, germanium or gallium arsenide.
solid-state drive (SSD) capacity - Solid-state drive (SSD) capacity is the maximum amount of data that can be stored on a solid-state drive.
solid-state storage - Solid-state storage (SSS) is a type of computer storage media made from silicon microchips.
solid-state storage garbage collection - Solid-state storage garbage collection, or SSD garbage collection, is an automated process by which a solid-state drive (SSD) improves write performance.
spindle - A spindle is a shaft that holds rotating hard disk drive (HDD) platters in place.
SRAM (static random access memory) - SRAM (static RAM) is a type of random access memory (RAM) that retains data bits in its memory as long as power is being supplied.
SSD (solid-state drive) - An SSD, or solid-state drive, is a type of storage device used in computers.
SSD caching - SSD caching, also known as flash caching, is the temporary storage of data on NAND flash memory chips in a solid-state drive so data requests can be met with improved speed.
SSD form factor - An SSD form factor is the size, configuration or physical arrangement of solid state storage media.
SSD RAID (solid-state drive RAID) - SSD RAID (solid-state drive RAID) is a methodology commonly used to protect data by distributing redundant data blocks across multiple SSDs.
SSD TRIM - SSD TRIM is an Advanced Technology Attachment (ATA) command that enables an operating system to inform a NAND flash solid-state drive (SSD) which data blocks it can erase because they are no longer in use.
SSD write cycle - An SSD write cycle is the process of programming data to a NAND flash memory chip in a solid-state storage device.
storage (computer storage) - Data storage is the collective methods and technologies that capture and retain digital information on electromagnetic, optical or silicon-based storage media.
storage filer - A storage filer is a type of file server designed and programmed for high-volume data storage, backup and archiving.
storage pools - Storage pools are capacity aggregated from disparate physical storage resources in a shared storage environment.
storage security - Storage security is the group of parameters and settings that make storage resources available to authorized users and trusted networks -- and unavailable to other entities.
storage snapshot - A storage snapshot is a set of reference markers for data at a particular point in time.
storage virtualization - Storage virtualization is the pooling of physical storage from multiple storage devices into what appears to be a single storage device -- or pool of available storage capacity.
storage volume - A storage volume is an identifiable unit of data storage.
tape backup - Tape backup is the practice of periodically copying data from a primary storage device to a tape cartridge so the data can be recovered if there is a hard disk crash or failure.
TCP/IP - TCP/IP stands for Transmission Control Protocol/Internet Protocol and is a suite of communication protocols used to interconnect network devices on the internet.
Terabyte (TB) - A terabyte (TB) is a unit of digital data that is equal to about 1 trillion bytes.
throughput - Throughput is a measure of how many units of information a system can process in a given amount of time.
Tier 0 - Tier 0 (tier zero) is a level of data storage that is faster, and perhaps more expensive, than any other level in the storage hierarchy.
tiered storage - Tiered storage is a method for assigning different categories of data to various types of storage media to reduce overall storage costs and improve the performance and availability of mission-critical applications.
TLC flash (triple-level cell flash) - TLC flash (triple-level cell flash) is a type of NAND flash memory that stores three bits of data per cell.
U.2 SSD (formerly SFF-8639) - A U.2 SSD is a high-performance data storage device designed to support the Peripheral Component Interconnect Express (PCIe) interface using a small form factor (SFF) connector that is also compatible with standard Serial-Attached SCSI (SAS) and Serial Advanced Technology Attachment (SATA)-based spinning disks and solid-state drives (SSDs).
unified storage (multiprotocol storage) - Unified storage -- sometimes called network unified storage or multiprotocol storage -- is a storage system that makes it possible to run and manage files and applications from a single device.
unzipping - Unzipping is the act of extracting the files from a zipped single file or similar file archive.

100 - ISC

VIR - WRI