SSD - 반도체 드라이브

NAND flash memory is non-volatile computer memory that can be electrically erased and reprogrammed which is today, commonly used in memory cards and USB flash drives, e.g. the iPod Shuffle and Nano.

Going into the next phase of evolution, portable computer makers are beginning to silently introduce NAND flash-based, Solid State Drives (SSD), departing from the current conventional platter-based hard drives. Being NAND flash-based, the new SSD promises a future with faster boot times, higher access speeds and lower read/write latency and most importantly lower power consumption and longer reliable lifespan. All of which, accrue from the apparent lack of mechanical parts. The SSD currently come in similar form factors as its existing platter-based brethren, a neat 2.5" enclosure featuring similar interface as current conventional hard drives.

일반 플래터형 HDD와 반도체형 SDD 비교. 사진출처 위키피디아.

At the moment, the biggest downside to SSD is the higher price per GB and lack of larger capacity versions. Whilst some of these limiting factors will change over time with lowered costs of productions when uptake increases and future R & D that will propel SSD capacities further, some limiting factors however are here to stay. Unlike its platter-based brethren, a SSD failure will result in dramatically lowered chances of data recovery, vulnerability against certain types of effects, including abrupt power loss (especially DRAM based SSDs), magnetic fields and electric/static charges and also slower accesss speed on sequential I/O compared to platter-based hard drives.

[참고자료 및 사진출처]
wikipedia

• Page name: Solid state drive
• Author: Wikipedia contributors
• Publisher: Wikipedia, The Free Encyclopedia.
• Date of last revision: 23 September 2007 13:51 UTC
• Date retrieved: 23 September 2007 16:19 UTC
• Permanent link: http://en.wikipedia.org/w/index.php?title=Solid_state_drive&oldid=159797533
• Page Version ID: 159797533