Re: Best strategy hard drive swapping?

on 12 Jul 2005, "Rod Speed" <rod_speed@xxxxxxxxx> wrote in
news:3jj9kdFq3pcbU1@xxxxxxxxxxxxxx:

> overload@xxxxxxxxxxxx wrote
>> HaHaHoHoHeeHee <HaHaHoHoHeeHee_fake@xxxxxxxxx> wrote
>
>>>>> Well it makes some sense to me since the IDE interfaces are
>>>>> so touchy
>
>>>> IDE interfaces are NOT "so touchy".
>
>>>>> such that adapters and longer cables are not recommended.
>
>>>> Good 24 inch cables, while not in spec, generally work.
>
>>> It is amazing to me that the recommended limit is
>>> 18 inches and even given that 24 inch cables might
>>> work, that shows how touchy the IDE interface is.
>
> True.
>
>>> Or maybe it's the MBs themselves
>
> Nope.
>
>>> or general design.
>
> Yep. IDE went with unterminated drives for the simplicity
> with those and a simple flat ribbon cable for the same reason.
>
> That was later improved with 80 wire cables with
> a ground wire between each signal wire, but that
> doesnt help with the length, just the speed.
>
>>> Point is that the whole standard is rather flaky if
>>> at electron speeds they cannot design cables/etc
>>> that can be extendable for reasonable lengths.
>
> They can but chose not to. It was only intended for
> internal use and the simplicity of unterminated drives.
>
>> The problem is electron speed.
>
> Nope.
>
>> Electrons flowing through wires generate an
>> induced magnetic field that effects other wires.
>
> Nothing to do with electron speed,
> thats the rise time of the signal edges.
>
>> Better (not IDE) cables use twisted pairs and
>> differential signaling so that any induced signals affect
>> both sides of the signal oppositely and cancel out.
>
> Correct. But that has nothing to do with electron
> speed which is the same in both types of cable.
>
>> Flat cables don't work well at high speeds.
>
> Well enough if they arent too long.
>

So, the suggestion of the fellow who recommended round cables, is
that worth pursuing. IOW is there any way I can run any type of
cable that would be long enough, say around 3-4 feet so that I
could hook up drives on that ide cable outside the box? Sorry if
that's a dumb question,but my background in digital electronics is
limited.

.

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