P - Definitions
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P
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.
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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.
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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.
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pay-as-you-go cloud computing (PAYG cloud computing)
Pay-as-you-go cloud computing (PAYG cloud computing) is a payment method for cloud computing that charges based on usage.
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PCIe SSD (Peripheral Component Interconnect Express solid-state drive)
A PCIe SSD (Peripheral Component Interconnect Express solid-state drive) is a high-speed expansion card that attaches a computer to its peripherals.
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pebibyte (PiB)
A pebibyte (PiB) is a unit of measure that describes data capacity.
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persistent storage
Persistent storage is any data storage device that retains data after power to that device is shut off.
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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.
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petabyte
A petabyte is a measure of memory or data storage capacity that is equal to 2 to the 50th power of bytes.
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primary storage (main storage)
Primary storage is the collective methods and technologies that capture and retain digital information in active use and critical for an organization's operations.
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private cloud storage (internal cloud storage)
Private cloud storage, also called internal cloud storage, is a service delivery model for storage within a large enterprise.
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program/erase cycle (P/E cycle)
A solid-state storage program/erase cycle (P/E cycle) is a sequence of events in which data is written to a solid-state NAND flash memory cell, such as the type found in a flash or thumb drive, and is subsequently erased and rewritten.
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protected mode
Protected mode, also called protected virtual address mode, is the primary mode of operation for an Intel-based x86 microprocessor.
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public cloud storage
Public cloud storage, also called online storage, is a service model that provides data storage on a pay-per-use basis.
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Pure Storage
Pure Storage is a provider of enterprise data flash storage products designed to substitute for electromechanical disk arrays.
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software portability
Software portability is a characteristic attributed to a computer program if it can run with minimal rework on operating systems (OSes) other than the one for which it was created.