wikipedia的描述，
http://en.wikipedia.org/wiki/Flash_memory
其实读写寿命现在就已经越来越不是问题了，看厂家给的warranty越来越长就能发现。
hybrid技术用SSD盘作为快速缓存，传统硬盘作为基础。
Flash memory as a replacement for hard drives
An obvious extension of flash memory would be as a replacement for hard disk drives. Flash memory does not have the mechanical limitations and latencies of hard drives, so the idea of a solid state drive, or SSD, is attractive when considering speed, noise, power consumption, and reliability.
There remain some aspects of flash-based SSD's that make the idea unattractive. For example, the cost per storage ratio of flash memory remains significantly higher than that of platter-based hard drives. Although this ratio is decreasing rapidly for flash memory, it will take some time for flash memory to catch up to the capacities and affordabilities offered by platter-based storage, but as research and development shifts toward the newer technology, this issue might dissolve.
There is also some concern that the finite number of erase/write cycles of flash memory would render flash memory unable to support an operating system. This seems to be a decreasing issue as warranties on flash-based SSD's are trending to equal or exceed those of current hard drives. [4] [5]
As of May 24, 2006, South Korean consumer-electronics manufacturer Samsung Electronics had released the first flash-memory based PCs, the Q1-SSD and Q30-SSD, both of which have 32GB SSDs. [6]
At Las Vegas CES 2007 Summit Taiwanese memory company A-DATA showcased SSD hard disk drives based on Flash technology in capacities of 32 GB, 64 GB and 128 GB.[1] Sandisk announced an OEM 32GB 1.8" SSD drive at CES 2007 [2]
Rather than entirely replacing the hard drive, hybrid techniques such as hybrid drive and ReadyBoost attempt to combine the advantages of both technologies, using flash as a high-speed cache for files on the disk that are often referenced, but rarely modified, such as application and operation system executable files.
http://en.wikipedia.org/wiki/Flash_memory
其实读写寿命现在就已经越来越不是问题了，看厂家给的warranty越来越长就能发现。
hybrid技术用SSD盘作为快速缓存，传统硬盘作为基础。
Flash memory as a replacement for hard drives
An obvious extension of flash memory would be as a replacement for hard disk drives. Flash memory does not have the mechanical limitations and latencies of hard drives, so the idea of a solid state drive, or SSD, is attractive when considering speed, noise, power consumption, and reliability.
There remain some aspects of flash-based SSD's that make the idea unattractive. For example, the cost per storage ratio of flash memory remains significantly higher than that of platter-based hard drives. Although this ratio is decreasing rapidly for flash memory, it will take some time for flash memory to catch up to the capacities and affordabilities offered by platter-based storage, but as research and development shifts toward the newer technology, this issue might dissolve.
There is also some concern that the finite number of erase/write cycles of flash memory would render flash memory unable to support an operating system. This seems to be a decreasing issue as warranties on flash-based SSD's are trending to equal or exceed those of current hard drives. [4] [5]
As of May 24, 2006, South Korean consumer-electronics manufacturer Samsung Electronics had released the first flash-memory based PCs, the Q1-SSD and Q30-SSD, both of which have 32GB SSDs. [6]
At Las Vegas CES 2007 Summit Taiwanese memory company A-DATA showcased SSD hard disk drives based on Flash technology in capacities of 32 GB, 64 GB and 128 GB.[1] Sandisk announced an OEM 32GB 1.8" SSD drive at CES 2007 [2]
Rather than entirely replacing the hard drive, hybrid techniques such as hybrid drive and ReadyBoost attempt to combine the advantages of both technologies, using flash as a high-speed cache for files on the disk that are often referenced, but rarely modified, such as application and operation system executable files.
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