Why static memory is unused instead of powered knotty drives?

computers are exceptionally slow , in my belief due to mechanical easier said than done drives.

What are the practical reasons that manufacturer are not using static memory which have no moving parts.

Why static memory is unused instead of powered knotty drives?

COST.



Let's compare.



Take this A-DATA 16GB Compact Flash (CF) Flash Card Model SPEEDY CF 16GB for $159.99. That's $10 per GB.



Then look at this awesome tough drive: HITACHI Deskstar T7K250 HDT722525DLA380 (0A31636) 250GB 7200 RPM 8MB $64.99 That's 25 cents per GB.



So if you wanted a 250GB Flash knotty drive, it would cost $2500.



SPEED:



The write-speed of Flash is very slow. I worked on a project spec once that used a drive controller that would write to parallel sets of FLASH memory at equal time. We determined that we need 16 parallel sets of flash devices to accomplish hard drive speeds. This system be going to be very expensive, but our purpose was to provide electronic memory that could store video information that could survive an airplane crash (in a so-called Black Box). Using striping and RAID techniques, even a partial dead loss could help to retain most of the video sequencing.



In certainty, the whole conception of RAID, is so that you can use TWO really cheap hard drives and not verbs about minute to minute backup.



Good luck and Happy Computing!
becasue it is expensive. You can get a 32gb solid state tough drive for $500 when u can get a 200gb powered drive 4 way smaller amount