I think you made a tactical error here, but I can't prove it. I still think that Windows has to be installed with the BIOS set to AHCI, and not switched afterward. I'm curious as to whether that's why you lost functionality. I have a new H-55 board that I installed Win 7 in AHCI mode from the jump, with a SATA optical, and I guess I'll find out if I'm right about this if I ever try to install any true IDE drives. Who knows though, I might get a rude awakening. The BIOS I suppose is the issue here. It would be interesting to know how well the newer ones handle mixed mode situations. I guess if I wasn't so lazy, I could just plug an IDE optical into it, and see what happens. I'm a big proponent of not wasting the IDE buss, while saving the SATA ports for HDDs, which can benefit from the connection speed, whereas optical drives can't.I had installed Windows7 recently in IDE mode. After installation, I switched to AHCI mode. After rebooting, Windows7 installed some drivers for the AHCI mode. Everything worked fine except Windows7 no longer was able to see my CD/DVD drives. I reinstalled Windows in IDE mode.'
This effect is because SATA (AHCI) is hot swappable. You can even go inside the machine running, and connect or disconnect SATA devices without harm or reboot. Running ACHI, you can swap Esata drives to your heart's content, and they'll be picked up instantly.When I was in AHCI mode, I noticed that Windows7 was able to identify my external hard drive instantly and it seemed as if the boot time was faster. When in IDE mode, in order to get Windows7 to identify my external hard drive, I have to manually go into device manager and click on 'scan for hardware changes.'
This effect is because SATA (AHCI) is hot swappable. You can even go inside the machine running, and connect or disconnect SATA devices without harm or reboot. Running ACHI, you can swap Esata drives to your heart's content, and they'll be picked up instantly.