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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 ...
Each flash module within a FlashSystem incorporates enterprise multi-level cell or single-level cell flash chips and FPGAs that provide IBM Variable Stripe RAID data protection as well as standard flash memory controller functions. IBM claims that these architectural attributes provide strong performance, reliability, and efficiency. [4]
The earliest flash file system, managing an array of flash as a freely writable disk, was TrueFFS by M-Systems of Israel, presented as a software product in PC-Card Expo at Santa Clara, California, in July 1992 and patented in 1993. [4] One of the earliest flash file systems was Microsoft's FFS2, for use with MS-DOS, released in autumn 1992. [5]
It develops all-flash data storage hardware and software products. Pure Storage was founded in 2009 and developed its products in stealth mode until 2011. Afterwards, the company grew in revenues by about 50% per quarter and raised more than $470 million in venture capital funding, before going public in 2015.
Flash memory is a solid-state chip that maintains stored data without any external power source. It is a close relative to the EEPROM; it differs in that erase operations must be done on a block basis, and its capacity is substantially larger than that of an EEPROM. Flash memory devices use two different technologies—NOR and NAND—to map data.
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 ...
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.
Nimble Storage, founded in 2008, is a subsidiary of Hewlett Packard Enterprise.It specializes in producing hardware and software products for data storage, particularly data storage arrays that utilize the iSCSI and Fibre Channel protocols, and includes data backup and data protection features.