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To: SBHX who wrote (32515)6/14/2006 10:29:39 AM
From: Pam  Respond to of 60323
 
Sequential read/write speed might be lower on flash, but random seek time is way faster.

Compared to solid state devices like flash, (Guessing here) I doubt random seek time is anywhere close to 10ms, so when when you take that into account, with normal workoads, I suspect the flash will still come out overall faster.


My understanding is that Nand accesses data serially (sequentially) and NOR randomly and that's the reason NOR is a lot faster and is used to execute code. Is my understanding incorrect?



To: SBHX who wrote (32515)6/14/2006 12:09:56 PM
From: inaflash  Respond to of 60323
 
Assuming the reported 20MB/s sequential rd/wr numbers of the SSD flash are correct, that makes the SSD flash 1/3 to 1/4 the speed of the HDD.


These are the initial flash drives designed with cost and time to market as big drivers. It's not too difficult to go wider to achieve the needed throughputs.


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