> 
> I think the problem here is the policy of the manufacturer. Working 
> together with Promise I found they had the problem, that their 
> standard IDE controller differs only in having one resistor less and 
> the lack of the Bios software to the raid controller. Even today 
> companies sell modified ide controllers (one additional resistor 
> soldered and the bios flashed with the raid software) as raid 
> controllers. If they would give away information about their software 
> and it was implemented in a driver, there was no need to buy the 
> raid controller anymore, because you had the same functionality 
> with their standard IDE controller.
> 
> I suppose the same is true for the other IDE Raid controllers.
> 
how hardware RAID-1 is implemented if it's standard IDE controller?

what is this resistor used for?