RAID

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  • RAID (redundant array of independent disks)

    RAID (redundant array of independent disks; originally redundant array of inexpensive disks) is a way of storing the same data in different places (thus, redundantly) on multiple hard disks. By placing data on multiple disks, I/O (input/output) oper... 

  • storage medium

    In computers, a storage medium is any technology (including devices and materials) used to place, keep, and retrieve data. 

  • double-parity RAID

    Double-parity RAID (redundant array of independent disks), also called diagonal-parity RAID, Advanced Data Guarding (RAID_ADG), or RAID-6, is a method of protecting against multiple storage drive failures by creating two sets of parity data on an arr... 

  • disk duplexing

    Disk duplexing is a variation of disk mirroring in which each of multiple storage disks has its own SCSI controller. 

  • disk striping

    In computers that use multiple hard disk systems, disk striping is the process of dividing a body of data into blocks and spreading the data blocks across several partitions on several hard disks. 

  • parity

    In this definition, learn what parity is and find out how it works. Plus, learn how to define parity bit and parity checking. 

  • disk cache

    A disk cache is a mechanism for improving the time it takes to read from or write to a hard disk. 

  • 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)

    In a personal computer, a hard disk drive (HDD) is the mechanism that controls the positioning, reading, and writing of the hard disk, which furnishes the largest amount of data storage for the PC. Although the hard disk drive (often shortened to "ha...