Thanx 4 your questions. U're extremely right. But we live nowadays, not in future. As I wrote, my idea with СС_0106 isn't applicable for different AHCI drivers. In future, if NVidia will release AHCI-2 driver, my concept must be revised, back to DEV's again. U're right. But it's another future problem, not today's. In normal IDE-mode, u have DEV_07??&CC_0101. U can't install NV masstor driver. In normal RAID-mode, u have DEV_07F8&CC_0104. U must install NV masstor driver + NV raid driver. In normal AHCI-mode, u have DEV_07F4&CC_0106. U must install NV masstor driver. But on MCP73, u can turn on RAID-mode in BIOS for controller, but for no one channel. In this case, u have (surprise!) DEV_07F8&CC_0101. U can (surprise!) install NV masstor driver. I've edited inf-file for this case. No doubt. I guess, it's for old controllers, with no AHCI support. And my practice tell me I'm right. I don't understand this question