Hi,
I had a problem like a lot of others!
I did the firmware flash successfully, installed windows and after a few restarts my hard drive stopped being recongnised. I then did a hdderase which enabled me to see the drive again in another windows install. This time after one restart the problem reappeared.
Today i did another hdderase, installed windows and after 5 restarts (3 of which were cold restarts) everything is working how it should. Maybe there is hope for some of you out there!
The first two attempts i had to set eide compatibilty in order to allow hdderase to work. Then i would reset the computer, enter bios, set to ahci mode before saving settings (allowing the computer to restart), then booted from windows 7 dvd.
However during this last attempt each time i had to restart the computer, whether it be to change to eide (to allow hdderase to work), then back to ahci mode after hdderase, then save setting and restart, i did not press the reset button. Instead i turned the power off and restarted from cold.
Fingers crossed that this has worked. Maybe other people with this problem could try this and see if it works for them.
Phil.