Today, there are several storage products such as 3D XPoint, QLC SSD, Open Channel SSD and customized SSD in data center. What types of products will become mainstream SSD in the future? This article discusses their features, cost, advantages and applications in detail. With comprehensive comparison, the author thinks customized NVMe SSD will be the mainstream in the next five years.
In order to avoid losing data after power failure, there is exiting power failure protection mechanism in SSD. Based on the content of SDRAM, power failure protection mechanism can be divided into three main types. In addition, the quality of an SSD can be judged from its stability, performance and lifetime.
SSD firmware consists of mapping table, garbage collection, wear leveling and so on. The lifetime of NAND Flash is similar to the barrel principle, it’s necessary to balance the number of all blocks. The larger the OP, the faster the garbage collection and the smaller corresponding write amplification will be. So reading and writing performance becomes better, but the space the user can use will b...
The article introduces the comparison between HDD and SDD in terms of medium, performance and appearance. As we all know, Flash is divided into NAND Flash and NOR Flash. However, this article mainly tells us working principle of NAND Flash.
SSD Trim is used to solve the problem of hard disk speed slowing down, which is developed by Microsoft bands together with other SSD manufacturers. If SSD supports Trim command, it will keep pace for a long time. Otherwise, the longer it takes, the slower it will be.
NVMe, short for Non-Volatile Memory Express, is a specification for SSD with PCI-E channel. The article mainly introduces major four advantages of NVMe SSD compared with AHCI, including low latency, IOPS improvement, lower power consumption and wide applicability of drivers.
The larger WA is, the more extra data will be written in flash memory. In other words, it leads to more actual data being written into flash memory of SSD compared with user data. So SSD design aims at making WA as small as possible. The larger OP is, the smaller WA is, which means SSD performance will be better.
SLC has a fast speed, long lifetime and an most expensive price. MLC is ordinary in speed, lifetime and price. TLC has the lowest speed and shortest lifetime with a most cheap price.
All of Micron, SK Hynix and YMTC announced their new generation three-dimensional flash solution in CMFS 2018. There are three advantages including enhancing memory density, cutting costs and reducing manufacturing cycle. Micron releases the world’s first QLC SSD of 5210 ION series and it is used as enterprise-class storage.
The mechanical hard disk work is achieved by mechanically, while solid state hard drive is pure chip structure without mechanical parts, and they have great difference in overall performance. In terms of reading and writing speed, SSD has higher speed than HDD because of its chip-based flash access mode. And SSD is called the new power of the hard disk industry with its superior performance.
