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Cable confusion

AFAIK

a. the parallel ATA interface on a board commonly uses a 40-pin connector
b. in a master+slave cable one end has the requisite 40 pin interface with the board
and the master and slave connectors often have a 'missing' pin.

The cable i've got here has *all three* connectors missing a pin so i can't possibly interface with the board. What's going on?
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CEHJ
Asked:
CEHJ
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2 Solutions
 
CallandorCommented:
You probably have an old motherboard that requires an old 40-wire cable.  The new 80-wire cables have one pin blocked out, to prevent improper insertion: http://www.tomshardware.com/2005/11/23/pc_interfaces_101/page15.html.
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CEHJAuthor Commented:
Yes, that mobo socket has missing pins. Mine doesn't. Do you think i can still get the right cables and what should i ask for? A 40-wire cable?
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CallandorCommented:
A 40-wire cable should have all the holes present.  Apparently, this motherboard only supports older ATA-33 drives or slower.  Which one do you have?
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CEHJAuthor Commented:
>>Apparently, this motherboard

Which one? Sorry if that sounds a stupid question ;-)

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CallandorCommented:
The one that doesn't have a missing pin (yours).
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CEHJAuthor Commented:
Good point. Where do i look for the board's serial number?
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CallandorCommented:
Not serial number, I want the model number - usually, it's stenciled in white on the edge of the board.  If you can boot it up, it will reveal it in the BIOS.
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CEHJAuthor Commented:
Ah. Not at the box but i might be able to get it out of dmesg perhaps?
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CEHJAuthor Commented:
Had to memorise this as had no pencil - hope it's right

BS440BX/BIS/2000

?
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CallandorCommented:
I would like to know the manufacturer as well, but I see a "440BX" string in there, which would make this pretty old - a Pentium III class, I'm guessing?  If so, ATA-33 is about right.
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CEHJAuthor Commented:
>>a Pentium III class, I'm guessing?

Yes

Didn't see a manufacturer's name
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CallandorCommented:
Then my original assessment holds: you have an old motherboard that requires a 40-wire cable.
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CEHJAuthor Commented:
OK. So i have to ask for 'a 40 wire ATA ribbon cable'?
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CallandorCommented:
Yes, they should not have connectors with blocked pins.
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andyalderSaggar makers bottom knockerCommented:
Heat a needle up with a lighter and push it into the plug to pull out the insert. Then it's not blocked. Or chop the pin off the motherboard connector with cutters, it doesn't connect to anywhere as you can see by looking at the missing pins on your disks.
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CEHJAuthor Commented:
That's a good idea - i prefer your first one - although i had contemplated your second ;-)
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andyalderSaggar makers bottom knockerCommented:
Sometimes the first one isn't an option since it's cheaper in the long run to make a plastic block with 39 holes in it and push 39 carefully constructed bits of metal into it than make a plastic block with 40 holes in it and push 39 carefully constructed bits of metal into it plus one insert. Drilling a hole in the cable block is farr harder than breaking the pin off the mobo.

Holding the needle with pliers is another good idea, I burnt myself last time I pulled a broken PS2 keyboard location key out of a motherboard.
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CEHJAuthor Commented:
Thanks guys
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