关注这种硬盘，转速只有4200转，不知道会不会影响性能，
这种硬盘是以后的发展方向,其实就是一种掉电后依然保存数据的SRAM(FLASH), 纯电子设备而不再是像现在硬盘的机电一体化，无噪声，抗撞击，性能很高,但如今大容量的SSD依然是很贵…

以下是Wiki的介绍:

　　Advantages:

　　Faster startup (as no spin-up is required).
　　Faster random access (there is no read/write head to move).
　　Extremely low read and write latency (seek) times, orders of magnitude faster than the best current hard disks drives.[1]
　　Faster boot and application launch time when hard disk seeks are the limiting factor. See Amdahl's law.
　　In some cases, somewhat longer lifetime[2] – Flash storage typically has a data lifetime on the order of 10 years before degradation. If data is periodically refreshed, it can store data indefinitely.[citation needed]
　　The disassembled components of a hard disk drive (left) and of the PCB and components of a solid state drive (right).Few to no moving parts.
　　For small SSDs up to 64GB, lower power consumption and heat production.
　　For small SSDs up to 64GB, no noise – Lack of moving parts makes the SSD completely silent (although high-end SSDs may include cooling fans).
　　Better mechanical reliability – Lack of moving parts almost eliminates the risk of mechanical failure. High level of ability to endure extreme shock, high altitude, vibration and temperatures[2], which apply to laptops and other mobile devices, or when transported.
　　Relatively deterministic performance [2] – unlike hard disk drives, performance of SSDs is almost constant and deterministic across the entire storage. This is because "seek time" can be constant, so fragmentation has less impact on performance than on physical drives.
　　For very low-capacity SSDs, lower weight and size. Size and weight per unit storage are still better for traditional hard drives, and microdrives allow up to 20 GB storage in a CompactFlash 42.8×36.4×5 mm (1.7×1.4×.2 in) form factor. Up to 64GB, SSD is lighter than Hard drive for the same size.

　　Disadvantages:

　　Price – as of late 2007, flash memory prices are still considerably higher per gigabyte than those of comparable conventional hard drives – around US$15 per GB compared to typically less than US$1 for mechanical drives.[3]
　　Limited capacity. As of December 2007, 32GB is still the most common sized on the market but Apple could change that with the introduction of the 64GB model in their new Macbook Air. However, on February 20, 2007, Adtron announced a record-breaking 160GB laptop-SSD[4]. In addition, at CES 2008, BiTMICRO Networks announced the release of SSD drives with capacities of up to 832GB, for release in Q3 2008. As of January 15, 2008, Apple launched MacBook Air, which has an optional 64GB SSD.
　　Vulnerability to certain types of effects, including abrupt power loss (especially DRAM based SSDs), magnetic fields and electric/static charges compared to normal HDDs (which store the data inside a Faraday cage).
　　Limited write cycles. Typical Flash storage will typically wear out after 300,000-500,000 write cycles, while high endurance Flash storage is often marketed with endurance of 1–5 million write cycles (many log files, file allocation tables, and other commonly used parts of the file system exceed this over the lifetime of a computer). Special file systems or firmware designs can mitigate this problem by spreading writes over the entire device (so-called wear levelling), rather than rewriting files in place.[5]
　　Slow random write speeds – as erase blocks on SSDs generally are quite large, they're far slower than conventional disks for random writes.[6]

[ 本帖最后由 kristyzw 于 2008-1-20 17:20 编辑 ]

为什么这个论坛的帖子都那么奇怪。。。。


老兄4200转那个是入门版的普通硬盘！！不是固态硬盘，SSD内部是没有动的部件的，就是几大块芯片。

which part of SOLID STATE disk do you not understand?

在大陆要什么时候才有卖呀?

LZ搞这么多英文谁看得懂啊!!

Thanks !......................................................