The English name is SSD Solid State Disk / Drive, Chinese translation for solid state disk. It can be widely used in servers, desktops, notebooks, mobile equipment, game machines, start quickly, improve performance while reducing power consumption.
Based on flash memory SSD FLASH was used as a storage medium, which is what we usually say SSD, FLASH flash memory chip has two kinds, namely MLC ( Multi Level Cell) and SLC ( Single Level multilayer unit Cell ) single unit. Its appearance can be made into a variety of touch, such as: notebook hard drives, memory cards, USB, micro hard disk type. The SSD solid-state hard drive is the biggest advantages can be moved, and the data protection from the power control, can adapt to various environments. Due to the adoption of the FLASH storage medium, its interior without mechanical structure, so no data search time, delay time and seek time. As everyone knows, the general hard mechanical characteristic of serious limitations in the data read and write speed, search data, hard disk mechanical arm rotates and hit data time usually within 5 ms - 15 milliseconds, and solid-state drives the search for data time in less than 0.1 Ms. in unit time, solid state disk IO number is a traditional mechanical the hard disk is more than 50 times.
Based on DRAM SSD : using DRAM as the storage medium, the application range is narrow. It follow traditional hard disk design, can be most of the operating system file system tools for volume setting and management, and provide the industry standard PCI and FC interface for connecting to a host or server. Application method can be divided into SSD disk and SSD hard disk array two. It is a kind of high performance memory, and long service life, a fly in the ointment is the need for independent power to protect the data security.
The advantages of SSD solid state disk:
1, speed. According to relevant media test : in the same configuration laptop computer, operating large-scale image processing software can clearly feel the SSD solid-state hard drive in to save or open the file in all faster. When the notebook computer power switch, with SSD solid-state hard drive notebook from the boot to the desktop that appears in only 18 seconds, but with traditional hard drive notebook when a total of 31 seconds, the gap is quite big.
2, durable and shockproof. Because of all the flash memory chip, so SSD solid state disk without any mechanical components, so that even if the move at high speed even with flip tilted conditions will not affect the normal use, but also in the laptop accidental fall or collision with hard thing will be able to minimize the possibility of data loss.
3, no noise. SSD solid state hard work very quiet, no noise. Due to no mechanical parts and a flash memory chip smaller heat a small, fast heat dissipation characteristics, SSD solid-state hard drive because there was no machine motor and fan, the work noise of 0 dB.
4, light weight. SSD solid state disk than conventional 1.8 Inch hard disk light weight 20-30 g, don't look down upon the weight, in notebook computers, satellite positioning system and other portable mobile products, smaller weight for portable. In addition, the lighter weight also makes notebook carrying a plurality of SSD solid state disk becomes possible.
