Can't install ReactOS 0.4.0 in Qemu 2.4.1 using AHCI Intel ICH9 virtual controller for HDD. Setup just complains "Setup could not find a harddisk". From log (attached below) it seems that controller is detected and UniATA driver is loaded, but that's all. Tried Windows 7 Enterprise EVAL ISO (don't have any other ISO right now), it can see virtual HDD (so that's not a Qemu problem or my misconfiguration).
Also I'm run into same issue on real HW with Intel ICH7 in AHCI mode - setup can't find HDD too.
Qemu start command:
qemu-system-x86_64 -device ich9-ahci,id=ahci0 -drive if=none,file=disk.img,format=raw,id=drive0 -device ide-drive,bus=ahci0.0,drive=drive0 -cdrom ReactOS-0.4.0.iso -boot d -serial file:ROSBoot.log
Both ICH7 and ICH9 in UniATA "theoretically supported list", so they expected to work as I can guess.