[Ti] 60gb TravelStar - quick question

[luke]

On Tuesday, January 14, 2003, at 12:06 PM, XXL wrote:

>>> he 4800 rpm drives are actually faster than the 5400 rpm drives
>>
>> Please elaborate.
>
> Much higher track density so the actual throughput is higher even at 
> the
> slower rotational speed.  IBM is shipping 7200 RPM Travelstars. "real 
> soon
> now" and those will probably be extremely good for DV capture.
> -Joe


you've got two cars driving down 2 roads...

car A at 5400 mph (rpm platter speed)

car B at 4200 mph (rpm platter speed)

car A's street is 1 mile long (2.5" platter)

car B's street is 1 mile long (2.5" platter)

however :

car A's street has only 40 billion (GigaBytes) fence posts (data bits) 
in that mile.

car B's street has 60 billion (GigaBytes) fence posts (data bits) in 
it's mile...

so...

car A has fewer fence posts to pass at it's 5200 speed due to the fence 
posts being spaced out further...

car B has more fence posts (data) per mile (same 2.5" platter)

the fence posts (data), from the perspective of the driver (hd's read 
head), are whizzing by much faster for the driver of the 4200 mph 'car' 
due to the greater number of fence posts on his street...


=)


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