IDE disk problem
Kostas Sfakiotakis
kostassf at cha.forthnet.gr
Thu Apr 14 22:46:53 UTC 2005
Joel wrote:
<snip>
>>Over here i have two machines . One is a Pentium 166 MMX machine and
>>the other one is an AMD Athlon XP 2700+ . Both were build by combining
>>parts not as a computer of this or the other brand .
>> All i know is this . The 166 MMX CPU machine is using non UDMA
>>cabling and most probably non Cable Select cables .
>
>
> That site described some clues you could use to figure out the old
> cables.
The story of the missing pin maybe ? . If you look the hard disk
connector you will notice that one pin is missing .
>
> One odd thing that it pointed out was that the pre-UltraDMA CS cables
> put the master in the middle of the cable, so you pretty much had to
> hang two drives on it in order to properly terminate the cable.
Yeap i always considered the top to be the master .
> If that works without generating random data errors under load,
Being a home user i don't generally put much load to the hard disks ,
so maybe i don't cross the limit that would bring the errors on surface.
I would guess the cable is not CS. Of course, I could be guessing wrong.
Don't worry about that . I can't seperate the Cable Select Cable from
the Non-Cable Select Cable myself . So i might be wrong myself .
I don't have much hands-on with ATA/IDE hardware. One problem with the
"if it
> works" approach, you may not be running something that will make the
> errors obvious, so you may some time down the road find valuable data
> gone awol.
Acknowledged and agreed. The odd thing is that when this happens i might
not understand that the problem was caused by the jumper settings .
>
> Those pages gave enough information that, if you know how to use a
> multimeter, you should be able to test it for CS wiring.
O.K. Well am not an expert but i can measure a resistance quite well .
>> In the Athlon XP 2700+ i configured the drives as Master and Slave (
>>this one
>>has UDMA Cables , am unable to identify them as Cable Select ones or not
>>) because
>>that was the working recipe i knew .
>
>
> Blue connector on one end, gray in the middle, black on the other.
I see many black connectors from here . I will recheck when the computer
is closed .
> If you do, be sure to put the master on the end (black), and not in the
> middle (gray).
Well i will have to recheck how things are , when the computer is closed .
The standard says it should allow master in the middle if
> you strap the master and slave selects, but I'm betting manufacturers
> are not testing their designs (maybe even not sample-testing their
> products) for anything but master on the end.
I wouldn't love to take the risk either.
> GMT+9 and a lousy MSWindowbox.
Greece and a FC1/Windows XP box ( am dualbooting , XP is for watching TV
linux for the other things ) .
I'm lazy and posting with a MUA called Becky
for the very least it has a nice name .
that works very nicely in the Japanese environment. It's MSWxxx
> only, but at least it doesn't try to run attachments for you.
>
>
>>for the very usefull information on Pin 28 .
>>I wasn't aware of such information . I bookmarked also the pcguide.com
>>site .
>
>
> Seems to be a good site for this kind of information. I was glad to find
> it, too.
Greetings to the Country of the Rising Sun . May it never stops
rising ( if it could understand how bad we behave it would certainly do
so but .. )
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