A year, a quarter, a month or even a week from now, the conclusion might be completely different, based on the at-the-moment supply-versus-demand status of flash memory and HDD, which after all are both commodities. Isn't predicting the future fun?
Flash memory is continuously been dominating on HDD for performance oriented modern applications by last more than two decades. Currently the high capacity MLC flash SSDs are becoming center of attraction for large size multimedia systems to support their increasing storage and throughput demands. The...
Structure.Flash memory architecture includes a memory array stacked with a multitude of flash cells. A basic flash memory cell consists of a storagetransistorwith a control gate and afloating gate, which is insulated from the rest of the transistor by a thindielectric materialor oxide layer. The...
Some flash memory advantages and disadvantages were evident from the beginning, and many of the cons have been addressed as the technology evolved. The first SSDs were far faster than any HDD available, but they had limited capacities, had sticker shock-inducing price tags and labored under the...
一、Nand Flash基本概念 NAND Flash全名为Flash Memory，属于非易失性存储设备(Non-volatile Memory Device)，基于浮栅(Floating Gate)晶体管设计，通过浮栅来锁存电荷，由于浮栅是电隔离的，所以即使在去除电压之后，到达栅极的电子也会被捕获。这就是闪存非易失性的原理所在。数据存储在这类设备中，即使断电也不会...
With a solid-state disk (SSD) flash drive you store data using flash memory. An SSD has advantages over a hard disk drive (HDD). Hard disks have an inherent latency, caused by mechanical components. A solid-state system has no moving parts and therefore less latency, so fewer SSDs are...
The reason why the USB flash drive has a smaller capacity is that it uses TLC memory particles. There are three main types of flash memory particles: SLC, MLC, and TLC. Flash drives usually use TLC, while external hard drives usually use MLC or even SLC. Each memory cell of SLC can ...
3D Nand阵列的概念原理构造:String正交于晶圆表面,垂直圆柱形的硅Channel从基质到BL,交叉的WL作为存储单元的控制门,类似于平面Nand上下是两个选择晶体管,相邻的Cell被设置成Dummy,所有的Memory和选择晶体管具有gate-all-around结构,在控制门和硅Channel之间具有最好的静电耦合。目前技术40nm的24层3D Nand实现等效的15nm...
SSD的性能不单取决于主控,闪存颗粒也会影响SSD的实际性能,并且闪存的质量也会影响SSD的速度、性能和使用寿命。所以用户购买SSD时,为避免踩坑,有必要深入了解下SSD闪存颗粒即NAND Flash的相关知识。 一、Nand Flash基本概念 NAND Flash全名为Flash Memory,属于非易失性存储设备(Non-volatile Memory Device),其浮栅(Flo...
DDR=Double Data Rate双倍速率,DDR SDRAM=双倍速率同步动态随机存储器,人们习惯称为DDR,其中,SDRAM 是Synchronous Dynamic Random Access Memory的缩写,即同步动态随机存取存储器。而DDR SDRAM是Double Data Rate SDRAM的缩写,是双倍速率同步动态随机存储器的意思。DDR内存是在SDRAM内存基础上发展而来的,仍然沿用SDRAM生产...