On 18 Feb 2001, at 18:35, wojtek@wojtek.from.pl wrote:

> how hardware RAID-1 is implemented if it's standard IDE controller?
> 

It is software.

> what is this resistor used for?

According to 
"http://www4.tomshardware.com/storage/00q1/000329/fastrak66-
04.html" and "http://www.tweakhardware.com/" it looks like it is just 
a "copyprotection" system. According to information found on the 
second site several other controllers on PCI cards and 
motherboards can be converted to Raid controllers simply by 
flashing the BIOS.

HTH

mike