GA-Z77X-UD3H rev 1.0 OK in IDE mode, sys drive not a boot option in AHCI mode

[Frogger]

Upgraded from a P5B Deluxe that ran in IDE mode.
Samsung HD103SJ 1TB system drive on Intel SATA3_0 - dual boot, partition 0 = XP, partition 2 = Win7.
Samsung HD501LJ 500GB data drive on Intel SATA3_1
LG HL-DT-ST DVD-RAM GH22NS30 DATA DVD+-RW on Intel SATA2_4
WDC WD10 EAVS-00D7B1 (external Fantom GreenDrive 1TB backup) on Marvell eSATA3_0.

Everything works fine with both controllers in IDE mode. I have GH22NS30 as 1st boot drive (press any key to boot from CD/DVD), then HD103SJ - select OS: XP or Win7 - defaults to Win7 after 5 seconds.

I made the necessary registry changes to Win7 to run AHCI. I changed both controllers to AHCI in BIOS. HD103SJ is no longer a boot option. Only GH22NS30 and  Fantom GreenDrive are listed, so I can't do an unattended reboot (NTLDR not found). I tried updating BIOS from F5 to F8, no change. It doesn't matter if the Marvell controller is AHCI or IDE - same result. And it doesn't matter if the Fantom GreenDrive is plugged into eSATA3_0 or eSATA3_1.

I can press F12 and manually select to boot from HD103SJ and everything works fine. But I can't define it as the default boot option in BIOS.

What gives?

Thx,
Frogger

[Fatman]

You will probably need to set the boot order in Bios to boot from that specific drive as first boot.

[Frogger]

As I stated, when I change controller to AHCI, " HD103SJ is no longer a boot option." It's even in the subject line.

[Fatman]

Lol yeh I didn't read that too good then hehehe

Ok so I deserved a smite for that thankyou!!

I have Raid setup on my board and I can see that to set as the boot..But as I don't have your board I figured you could also do that. But I guess not.