Storage Technology Definitions

This glossary explains the meaning of key words and phrases that information technology (IT) and business professionals use when discussing storage and related software products. You can find additional definitions by visiting WhatIs.com or using the search box below.

  • H

    HA storage (high-availability storage)

    High-availability storage (HA storage) is a storage system that is continuously operational or provides at least 99% uptime.

  • Hadoop as a service (HaaS)

    Hadoop as a service (HaaS), also known as Hadoop in the cloud, is a big data analytics framework that stores and analyzes data in the cloud using Hadoop.

  • 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.

  • hard drive shredder

    A hard drive shredder is a mechanical device that physically destroys old hard drives in such a way that the data they contain cannot be recovered.

  • hard zoning

    Hard zoning is used to allocate resources and control access in a storage-area network (SAN).

  • hardware RAID (hardware redundant array of independent disk)

    Hardware RAID is a form of RAID where processing is done externally.

  • 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... (Continued)

  • HD-ROM (High-Density - Read Only Memory)

    HD-ROM (High-Density - Read Only Memory) is a high-capacity storage technology developed at Norsam Technologies in conjunction with an IBM research group that enables a disk to store hundreds of times as much information as a CD-ROM. HD-ROM uses a very narrow, finely-focused particle beam (charged gallium ions) to write data.

  • HDD form factor (hard disk drive form factor)

    HDD form factor is the size or geometry of a hard disk drive, determining the device’s compatibility with the drive bays in a storage array or enclosure, server, portable computer or other computing device.

  • helical scan

    Helical scan is a way of recording information onto magnetic tape.

  • HIPAA-compliant cloud storage

    HIPAA-compliant cloud storage implements the guidelines of the U.S. Health Insurance Portability and Accountability Act (HIPAA).

  • holographic disk drive

    A holographic disk drive is a holographic storage device that uses a laser to store data to optical media in three dimensions, maximizing storage capacity by using the media's depth... (Continued)

  • holographic storage (holostorage)

    Holographic storage is computer storage that uses laser beams to store computer-generated data in three dimensions.

  • host bus adapter (HBA)

    A host bus adapter (HBA) provides physical connectivity and input/output between a server and a network and/or storage device.

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