🚀 go-pugleaf

In article <1993Jan24.014406.27423@mlb.semi.harris.com> sonny@trantor.harris-atd.com (Bob Davis) writes:
>In article <1993Jan23.231824.24755@rose.com> gyl.midroni@rose.com (gyl midroni) writes:
>	[DELETIONS]
>>    It seems to me that local bus disk access will be a speed booster 
>>for the reason of faster data communicatio with the CPU / memory.  It 
>>is four times faster to get data off the disk at 33 MHz off the local 
>>bus connection to the CPU and memory than at 8 MHz via the ISA bus. 
>>As simple as that... no?   Why would this impact system performance 
>
>	And isn't it expensive overkill to provide a 132 million bytes/sec
>truck (local bus) to haul 3 million bytes/sec freight ( a fast hard drive's
>maximum, spin-limited data transfer rate)?  Seems like that expensive local 
>bus truck will be sitting idle almost 98% of the time. Even the cheaper
>ISA bus truck will be idle almost 44% of the time. This assumes that
>DMA transfers from disk to memory can burst the data at the bus rate and then
>free up the memory address bus until the next truckload of bytes can be spun 
>up off the disk. (Can a local bus card use DMA, as I am assuming?)
>

Hmmmm

What is "big bucks" here? How much more will a local bus IDE
paddle card cost compared to an ISA one? I thought one endearing
feature of local bus is supposed to be that it is cheap.

My guess is that if you want a small Novell server you'll see the 
benefits of local bus IDE, otherwise you'll only notice it at some
times (eg when loading apps).



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Iskandar Taib                          | The only thing worse than Peach ala
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