S - Definitions

  • S

    SAN switch (storage area network switch)

    A SAN switch (storage area network switch) is a device that connects servers and shared pools of storage devices and is dedicated to moving storage traffic.

  • 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 Express (SATAe)

    SATA Express (SATAe or Serial ATA Express) is a bus interface to connect storage devices to a computer motherboard, supporting SATA and PCI Express protocols simultaneously.

  • 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.

  • 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.

  • semiconductor fab

    A semiconductor fab -- short for fabrication -- is a manufacturing plant in which raw silicon wafers are turned into integrated circuits (ICs).

  • SerDes (serializer/deserializer)

    A SerDes or serializer/deserializer is an integrated circuit (IC or chip) transceiver that converts parallel data to serial data and vice-versa.

  • 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-based storage

    Server-based storage is a re-emerging class of data storage that removes cost and complexity by housing storage media inside servers rather than in dedicated and custom-engineered storage arrays.

  • shingled magnetic recording (SMR)

    Shingled magnetic recording (SMR) is a technique for writing data to a hard disk drive (HDD) whereby the data tracks partially overlap to increase the areal density and overall storage capacity per disk.

  • software RAID (software redundant array of independent disk)

    Software RAID is a form of RAID (redundant array of independent disks) performed on the internal server.

  • software-defined storage (SDS)

    Software-defined storage (SDS) is a computer program that manages data storage resources and functionality and has no dependencies on the underlying physical storage hardware.

  • 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. SSS stores data electronically instead of magnetically, as spinning hard disk drives (HDDs) or magnetic oxide tape do.

  • 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.

  • 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. The form factor determines the media's physical compatibility and interchangeability with other computer components or devices.

  • 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 as a service (STaaS)

    Storage as a service can be delivered on premises from infrastructure that is dedicated to a single customer, or it can be delivered from the public cloud as a shared service that's purchased by subscription and is billed according to one or more usage metrics.

  • storage at the edge

    Storage at the edge is the collective methods and technologies that capture and retain digital information at the periphery of the network, as close to the originating source as possible.

  • storage capacity planning

    Storage capacity planning is the practice of assessing current data storage needs and forecasting future storage requirements.

  • storage class memory (SCM)

    Storage class memory (SCM) is a type of physical computer memory that combines dynamic random access memory (DRAM), NAND flash memory and a power source for data persistence.

  • storage filer

    A storage filer is a type of file server designed and programmed for high-volume data storage, backup and archiving.

  • storage medium (storage media)

    In computers, a storage medium is a physical device that receives and retains electronic data for applications and users and makes the data available for retrieval.

  • 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 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. It can be a removable hard disk, but it does not have to be a unit that can be physically removed from a computer or storage system.

  • 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.

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