Solid state disk lackluster for laptops, PCs
Laptops, desktops won't see a cost/benefit advantage in SSD for about two years
http://www.goodgearguide.com.au/index.php/id;504760406;pp;1;fp;4;fpid;21343358
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Intel's and Micron Technology's upcoming SSDs will be based on 32Gbit chip technology. Each NAND flash chip will cost just shy of US$4.00, which works out to about US$0.99 a gigabyte. The companies will be the first to break the US$1.00 a gigabyte barrier with their upcoming consumer SSD products, according to Jim Handy, an analyst at Objective Analysis. [...]
"Sequential performance is easy to improve with a DRAM buffer. But if you look at a user profile on a PC, most operations are random," Wong says.
The problem associated with random writes on SSD is that NAND requires an application to find an empty block to write to. If there is no empty block, the application must actually erase the data before it can write to the block, creating about a 2-millisecond delay, which adds up to significant overhead, Wong says. [..]
According to Avian Securities' Cohen, high-end flash drives outpace high-end Fibre Channel drives at a 20:1 price/performance ratio because businesses must use as many as 20 15,000rpm hard disk drives in order to attain the random read performance of a single SSD drive. [..]
"The class of product EMC needs is fundamentally different from what notebooks need," Wilkison says. "The reality is that performance varies depending on the applications running on it. Random write speeds are horrible. And guess what? As PC users, writes are important." [..]