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Flash memory is an electronic non-volatile computer memory storage medium that can be electrically erased and reprogrammed. The two main types of flash memory, NOR flash and NAND flash, are named for the NOR and NAND logic gates. Both use the same cell design, consisting of floating-gate MOSFETs. They differ at the circuit level depending on ...
According to Gartner, IBM was the number one all-flash storage array vendor in 2014 selling over 2,100 FlashSystems totaling 62 petabytes (PB) of capacity. The IBM FlashSystem commanded 33% of the total all-flash capacity sold by all vendors for the year. [5]
A flash file system is a file system designed for storing files on flash memory–based storage devices. While flash file systems ... managing an array of flash as a ...
Non-volatile memory is typically used for the task of secondary storage or long-term persistent storage. The most widely used form of primary storage today [ as of? ] is a volatile form of random access memory (RAM), meaning that when the computer is shut down, anything contained in RAM is lost.
Usually, flash memory controllers also include the "flash translation layer" (FTL), a layer below the file system that maps host side or file system logical block addresses (LBAs) to the physical address of the flash memory (logical-to-physical mapping). The LBAs refer to sector numbers and to a mapping unit of 512 bytes.
Each storage system model comes with a set configuration of processor, RAM, and non-volatile memory, which users cannot expand after purchase.With the exception of some of the entry point storage controllers, the NetApp FAS, ASA, and AFF systems usually have at least one PCIe-based slot available for additional network, tape and/or disk connections.
IBM FlashCore Modules (FCM) are solid state technology computer data storage modules using PCI Express attachment and the NVMe command set. [1] They are offered as an alternative to industry-standard 2.5" NVMe SSDs in selected arrays from the IBM FlashSystem family, with raw storage capacities of 4.8 TB, 9.6 TB, 19.2 TB and 38.4 TB.
Charge trap flash (CTF) is a semiconductor memory technology used in creating non-volatile NOR and NAND flash memory. It is a type of floating-gate MOSFET memory technology , but differs from the conventional floating-gate technology in that it uses a silicon nitride film to store electrons rather than the doped polycrystalline silicon typical ...
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