SiI tell that the Si3112A have some(And have application circuits), but my Adaptec 1205SA still has 4½ years warranty.
The support is pretty bad at Adaptec tho : Latest bios and driver are from about december 2004 and driver on adaptec site is from january 2003. I modified the 1.2.?.? driver from the SiI SATALink card to give it the same name as the old driver but that's all.
Soldering on the 3112 will be pretty hard.
And also, if the sync signal looks darker on the LED, I don't have pretty much problems with this. I could add a small capactor somewhere to make this 010101 seem a lower voltage, and then add a resistor to pass it to a 7407 but I don't know if it will be accurate.
I just don't want to lose my warranty, that's the problem. The card is 4 months old and even my local shop still has a warranty. I would prefer to cut a SATA cable and to get the signal from there instead.
Maybe there is a connector on the HDD. Will have to ask WD. A Maxtor is cool for this : since Quantum HDDs and maxtors are the same thing, there's always a little SMD HDD status LED under them. You just need a photoresistor to make the thing work.