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Storage-area network (SAN)

Terms related to storage area networks, including definitions about SAN management and words and phrases about virtual SANs, Fibre Channel and iSCSI SANs.

100 - ZON

  • 1000BASE-T (Gigabit Ethernet) - 1000BASE-T is Gigabit Ethernet -- 1 gigabit is 1,000 megabits per second (Mbps) on copper cables, using four pairs of Category 5 (Cat5) unshielded twisted pair (UTP) to achieve the gigabit data rate.
  • backup storage device - A backup storage device is used to make copies of data that is actively in use.
  • base address - A base address is a unique location in primary storage (or main memory) that serves as a reference point for other memory locations called absolute addresses.
  • block storage - Block storage is an approach to data storage in which each storage volume acts as an individual hard drive that is configured by the storage administrator.
  • cloud NAS (cloud network attached storage) - Cloud NAS (network attached storage) is remote storage that is accessed over the Internet as if it was local.
  • cloud storage - Cloud storage is a service model in which data is transmitted and stored on remote storage systems, where it is maintained, managed, backed up and made available to users over a network (typically the internet).
  • cloud storage API - A cloud storage API is an application program interface that connects a locally-based application to a cloud-based storage system, so that a user can send data to it and access and work with data stored in it.
  • 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.
  • compaction - In a data center, compaction is the reduction or consolidation of hardware to make better use of physical floor space.
  • data availability - Data availability is a term used by some computer storage manufacturers and storage service providers (SSPs) to describe products and services that ensure that data continues to be available at a required level of performance in situations ranging from normal through "disastrous.
  • data protection management (DPM) - Data protection management (DPM) comprises the administration, monitoring and management of backup processes to ensure backup tasks run on schedule and data is securely backed up and recoverable.
  • Ethernet hard drive - An Ethernet hard drive is an external hard drive with a direct Ethernet interface to simplify storage networks, data centers and cloud operations.
  • FCoE (Fibre Channel over Ethernet) - FCoE (Fibre Channel over Ethernet) is a storage protocol that enable Fibre Channel (FC) communications to run directly over Ethernet.
  • Fibre Channel - Fibre Channel is a high-speed networking technology primarily used for transmitting data among data centers, computer servers, switches and storage at data rates of up to 128 Gbps.
  • Fibre Channel adapter - A Fibre Channel (FC) adapter is a hardware component that provides connectivity from a server to a storage area network (SAN).
  • Fibre Channel switch (FC switch) - A Fibre Channel switch is a networking device that is compatible with the Fibre Channel (FC) protocol and designed for use in a dedicated storage area network (SAN).
  • 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.
  • hard zoning - Hard zoning is used to allocate resources and control access in a storage-area network (SAN).
  • high availability (HA) - High availability (HA) is the ability of a system to operate continuously without failing for a designated period of time.
  • HIPPI (High-Performance Parallel Interface) - HIPPI (High-Performance Parallel Interface) is a standard point-to-point protocol for transmitting large amounts of data at up to billions of bits per second over relatively short distances, mainly on local area networks (LAN s).
  • hot swap - A hot swap is the replacement of a hard drive, CD-ROM drive, power supply, or other device with a similar device while the computer system using it remains in operation.
  • Internet Small Computer System Interface (iSCSI) adapter - An iSCSI adapter is a network interface card that enables the transmission of data between host computers and iSCSI-based storage arrays and typically handles the TCP/IP processing.
  • Iometer - Iometer allows users to set custom input/output profiles to simulate different application workloads for testing.
  • IP SAN (Internet Protocol storage area network) - An IP SAN is a dedicated storage area network (SAN) that allows multiple servers to access pools of shared block storage devices using storage protocols that depend on the Internet Engineering Taskforce standard Internet Protocol suite.
  • 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.
  • LAN-free backup - LAN-free backup is the process of backing up server data to a centralized storage device rather than moving it across a local-area network (LAN).
  • 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.
  • LUN masking - LUN masking is a further constraint added to zoning, subdividing access to the port so that only LUNs authorized to access a specific server can access the corresponding port.
  • LUN zoning - LUN zoning is a method of configuring SAN fabric to match logical unit numbers (LUNs) to the proper servers.
  • Microsoft iSCSI Initiator - Microsoft iSCSI Initiator is a tool that connects external iSCSI-based storage to host computers with an Ethernet network adapter.
  • 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.
  • 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.
  • multiprotocol storage - Multiprotocol storage, also known as unified or federated storage, supports protocols traditionally associated with SAN block-based and NAS file-based storage in a single device.
  • 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.
  • 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.
  • 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.
  • pathing (path control) - Pathing (sometimes called path control) is a networking approach used to address the specific needs of storage networks (as compared to ordinary message networks) by changing the way that communication paths are managed and organized.
  • physical address - A physical address is a binary number in the form of logical high and low states on an address bus that corresponds to a particular cell of primary storage (also called main memory), or to a particular register in a memory-mapped I/O (input/output) device.
  • SAN-in-a-box - A SAN-in-a-box, also known as a SAN-in-a-can or a SAN kit, is a data storage device that includes all the basic SAN components are in a single package.
  • serial-attached SCSI (SAS) - Serial-attached SCSI (SAS) is a point-to-point protocol used to transfer digital data between servers and SAS storage devices.
  • serverless backup - Serverless data backup removes backup procedures from production servers so that the time usually spent on backup functions can be used for other server tasks.
  • soft zoning - Soft zoning is used to allocate resources and control access in a storage-area network (SAN).
  • storage consolidation - Storage consolidation, also called storage convergence is a method of centralizing data storage among multiple servers.
  • storage encryption - Storage encryption is the use of encryption/decryption of backed-up and archived data, both in transit and on storage media.
  • storage filer - A storage filer is a 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 provisioning - Storage provisioning is the process of assigning storage, usually in the form of server disk drive space, in order to optimize the performance of a storage area network (SAN).
  • 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 utilization - Storage utilization is a measure of how well the available data storage space in an enterprise is used.
  • 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 -- that is managed from a central console.
  • switching fabric - Switching fabric is the combination of hardware and software that moves data coming in to a network node out by the correct port (door) to the next node in the network.
  • tape backup - Tape can help fix an unstructured data backup issue and is a good archiving medium.
  • thin provisioning (TP) - Thin provisioning (TP) is a method of optimizing the efficiency with which the available space is utilized in storage area networks.
  • tiered storage - Tiered storage is a way to assign different categories of data to various types of storage media with the objective of reducing the total cost of storage.
  • 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.
  • utility storage - Utility storage is a service model in which a provider makes storage capacity available to an individual, an organization or a business unit on a pay-per-use basis.
  • virtual LUN or thin LUN - A virtual LUN (virtual logical unit number) is a representation of a storage area that is not tied to any physical storage allocation.
  • virtual storage area network (VSAN) - A virtual storage area network (VSAN) is a logical partition in a physical storage area network (SAN).
  • virtual tape - Virtual tape is an archival storage technology that makes it possible to save data as if it were being stored on tape although it may actually be stored on hard disk or on another storage medium.
  • What is a SAN? Ultimate storage area network guide - A storage area network (SAN) is a dedicated high-speed network or subnetwork that interconnects and presents shared pools of storage devices to multiple servers.
  • What is failover? - Failover is a backup operational mode in which the functions of a system component (such as a processor, server, network, or database, for example) are assumed by secondary system components when the primary component becomes unavailable through either failure or scheduled down time.
  • Zadara VPSA and ZIOS - Zadara Storage provides block, file or object storage with varying levels of compute and capacity through its ZIOS and VPSA platforms.
  • zoning - In a storage area network (SAN), zoning is the allocation of resources for device load balancing and for selectively allowing access to data only to certain users.
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