It uses drivers from Silicon Image.
Boot to safe mode. Open device manager. Look at the driver properties or name for the card. It will have drivers like this:
SI3124r.sys
or SI3124.sys
Or be named BASE or RAID.
The numbers may be different and you should note that. If you have one of the drivers with R, that means that the card is functioning as a RAID card and you should download that appropriate version.
If you have one of the drivers like that above without the R, then the card is functioning as a BASE version card. Install that version instead.
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Install like this in safe mode:
Right click on card. Update driver software. Browse my computer. Let me pick. Have disk. Browse. Now find and double click on the .inf in the extracted folder from the download. Hit ok then next and it will install.
Reboot to normal mode:
http://www.siliconimage.com/support/ ------------------
If that's the only HDD going now attached to the card, you are going to have problems booting to it and it may actually be impossible, no matter what. Forget the whole idea then.