Solid state Definitions

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  • N

    NVMe over Fabrics (Nonvolatile Memory Express over Fabrics)

    Nonvolatile Memory Express over Fabrics enables NVMe message-based commands to transfer data between a host and target solid-state storage device or system over a network.

  • NVMe over FC (Nonvolatile Memory Express over Fibre Channel)

    Nonvolatile Memory Express over Fibre Channel enables NVMe-based message commands to transfer data between a host and storage subsystem over an FC network fabric.

  • O

    overprovisioning (SSD overprovisioning)

    Overprovisioning, in a storage context, is the inclusion of extra storage capacity in a flash solid state drive (SSD). The extra capacity is not visible to the host as available storage.

  • 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.

  • 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.

  • Q

    queue depth

    Queue depth, in storage, is the number of pending input/output (I/O) requests for a volume.

  • R

    RAM-based solid state drive (SSD)

    A RAM-based solid state drive is a storage device that is made from silicon microchips, has no moving parts and stores data electronically instead of magnetically.

  • read-intensive SSD (read-intensive solid-state drive)

    A read-intensive solid-state drive (SSD) is a NAND flash-based storage or caching device used with applications that write data infrequently, in contrast to SSDs that target write-intensive workloads.

  • RRAM or ReRAM (resistive RAM)

    RRAM or ReRAM (resistive random access memory) is a form of nonvolatile storage that operates by changing the resistance of a specially formulated solid dielectric material.

  • S

    SAS SSD (Serial-Attached SCSI solid-state drive)

    A SAS solid-state drive (SSD) is a NAND flash-based storage or caching device that uses the serial-attached SCSI (SAS) interface to connect to the host computer and fits into the same slot as a hard disk drive (HDD).

  • semiconductor fab

    A semiconductor fab is a manufacturing plant in which raw silicon wafers are turned into integrated circuits. 

  • server-based SSD

    A server-based SSD is a solid state drive that may be manufactured in a PCI Express form factor.

  • short stroking

    Short stroking is the practice of formatting a disk drive such that data is written only to the outer sectors of the disk's platters.

  • single level cell (SLC) flash

    Single level cell (SLC) flash is a type of solid-state storage (SSS) that stores 1 bit of data per cell of flash media.

  • Skyera

    Skyera was an all-flash array vendor that Western Digital's HGST subsidiary purchased in an all-cash transaction in December 2014.

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