P - Definitions

  • P

    P/E cycle

    A solid-state-storage program-erase cycle is a sequence of events in which data is written to solid-state NAND flash memory cell (such as the type found in a so-called flash or thumb drive), then erased, and then rewritten.

  • packet writing

    Packet writing is a technology that enables the writing of data to a recordable compact disk (CD-R) incrementally, in multiple small blocks of data, rather than in a single block (as in disk-at-once recording), or in blocks defined by tracks (as in track-at-once recording), the other two common methods.

  • Panasas

    Panasas is a scale-out NAS (network-attached storage) vendor that produces hardware and software for demanding technical and enterprise environments.

  • parallel file system

    A parallel file system is a software component designed to store data across multiple networked servers and to facilitate high-performance access through simultaneous, coordinated input/output operations (IOPS) between clients and storage nodes.

  • parallel I/O

    Parallel I/O is a way of performing multiple input/output operations concurrently, rather than serially.

  • parity

    Parity is a method of detecting errors in data transmissions between computers, while parity bit and parity checking are used in RAID technology to guard against data loss.

  • partition

    Partitioning a hard disk drive is the first step in preparing it for data storage. A disk partition is a carved out logical space used to manage operating systems and files.

  • pay-as-you-go cloud computing (PAYG cloud computing)

    The pay-as-you-go cloud computing (PAYG cloud computing) method charges users only for the services they use, eliminating wasted resources.

  • pay-as-you-grow pricing

    Vendors that offer a pay-as-you-grow storage allow customers with growing environments to acquire capacity after an array has been installed through the purchase of licenses.

  • 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.

  • pebibyte (PiB)

    A pebibyte (PiB) is a unit of measure used to describe data capacity.

  • persistent storage

    Persistent storage is any data storage device that retains throughout instances of lost power.

  • personal cloud storage (PCS)

    Personal cloud storage (PCS) is a local network-attached storage (NAS) device that lets users store data, photos, music, videos and other files and is optimized for media streaming.

  • petabyte

    A petabyte is a measure of memory or data storage capacity that is equal to 2 to the 50th power of bytes.

  • phase change

    Phase change is a type of compact disk (CD) recording technology that enables the disks to be written, erased, and rewritten through the use of a layer of a special material (called the phase change layer) that can be changed repeatedly from an amorphous (formless) to a crystalline state, or phase-through exposure to variably-powered laser beams.

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