http://12.24.47.40/display/2/kb/article.asp?aid=10516
SiI3112A: nForce Data Corruption
Data corruption problems can occur with nForce-based motherboards such as the Asus A7N8X when multiple hard drives are attached to the SATA controller. This problem is related to an issue with the PCI controller in the nVidia chipset and can be fixed with a system BIOS update.
For the latest BIOS updates for your nForce motherboard that fixes the data corruption problem, please visit the website of your motherboard maker for the appropriate BIOS and flash utilities. Silicon Image cannot provide the solution to this issue since it involves a change to the system BIOS settings on the motherboard. There were no revisions made to the drivers for the SiI3112A so you may use the latest version posted on this website. Please check the Related Articles link on the lower right.
Links to a few motherboard download sites are below:
Asus
Abit
Leadtek
Comments/Special Instructions:
Please get the system BIOS update from your respective motherboard manufacturer