🚀 go-pugleaf

Meat Plow wrote
> ClueLess <clueless@wilderness.org.invalid>wrote
>> ClueLess <clueless@wilderness.org.invalid> wrote

>>> Here is a strange problem, when I connect my hard disk
>>> using the 80 wire cable my computer does not recognize it.

>> Here are some clarifications:

>> Mercury 845GL mobo
>> Only one drive checked at a time.
>> The drives checked are all Seagate 80 gb
>> The original hard disk was working for years with the 80 conductor
>> cable, correctly mounted - blue end on mobo, hard drive at the end,
>> set as master.

>> Only after I checked with another similar hard disk that the problem started.

>> I have tried several 80 conductor cables and none work.

>> All the drives are recognized without exception when using the 40 conductor cable.

>> I have been using computers since CP/M days and assemble
>> my own when required but this has got me stumped.

>> I am very happy at the enthusiastic response from
>> so many of you but the explanation still eludes :-(

> Have you tried a new, unopened package 80 wire cable? I can't imagine
> an IDE controller knowing the difference between 40 and 80 wires

They do actually. The two cables look different to the motherboard.

> unless there is something wrong with it in that it
> is sensitive to a difference in cable impedence.

One of the pins on the motherboard connector is different.

> I would assume an 80 wire cable has a difference in impedence vs a 40 wire.

That effect isnt used.