[WIN7] IDE to AHCI : Didnt need a reinstall?

KonMan · 7th April 2011, 4:07 PM

Guys/Gals,

I thought that if you had Windows 7 installed in 'IDE' for the OS harddrive, then when switching to AHCI in the bois you should get a BSOD ....

...but I didnt? Gigabyte P67A-UD4, WIN7 SP1, i72600K, WD Back 1TB, 16 Gig RAM.

So, why is it so...

Cheers,
Kon.

background: Got a PC pre-installed with Win7 from a vendor and noticed that in the BIOS the HD was IDE. I cursed in Klingon and then changed to AHCI, put the Win7 Disk in for re-install, but I was too late and it booted into windows!!!!

Tenoq · 7th April 2011, 4:43 PM

Windows 7 includes basic AHCI drivers for some chipsets (namely Intel). This is probably why it "just worked."

The other reason might be that it was installed with AHCI initially and them the BIOS was set back to IDE (for whatever reason). This would also make it a successful boot.

blue_bug · 7th April 2011, 5:09 PM

Maybe they had the AHCI driver enabled.

KonMan · 7th April 2011, 11:15 PM

Well Im just glad that
a) I was slow to press a key to boot from CD/DVD
b) It works!

KonMan.

Linkin · 7th April 2011, 11:21 PM

1) Set windows to use AHCI in regedit (google is your friend)
2) Reboot and set the BIOS to AHCI
3) ????
4) Profit!

KonMan · 10th April 2011, 9:09 PM

Linkin - a verry good point.

Before I assume (and post) anything again, I will google it!!

Cheers,
konman

7th April 2011, 4:07 PM	#1
KonMan Member Join Date: Jun 2001 Location: Melbourne Posts: 471	IDE to AHCI : Didnt need a reinstall? Guys/Gals, I thought that if you had Windows 7 installed in 'IDE' for the OS harddrive, then when switching to AHCI in the bois you should get a BSOD .... ...but I didnt? Gigabyte P67A-UD4, WIN7 SP1, i72600K, WD Back 1TB, 16 Gig RAM. So, why is it so... Cheers, Kon. background: Got a PC pre-installed with Win7 from a vendor and noticed that in the BIOS the HD was IDE. I cursed in Klingon and then changed to AHCI, put the Win7 Disk in for re-install, but I was too late and it booted into windows!!!!

7th April 2011, 4:43 PM	#2
Tenoq Member Join Date: Mar 2003 Location: Melbourne Posts: 3,672	Windows 7 includes basic AHCI drivers for some chipsets (namely Intel). This is probably why it "just worked." The other reason might be that it was installed with AHCI initially and them the BIOS was set back to IDE (for whatever reason). This would also make it a successful boot. __________________ Successful traders: MANY!

7th April 2011, 5:09 PM	#3
blue_bug Member Join Date: Sep 2001 Location: Melbourne Posts: 911	Maybe they had the AHCI driver enabled.

7th April 2011, 11:15 PM	#4
KonMan Member Join Date: Jun 2001 Location: Melbourne Posts: 471	Well Im just glad that a) I was slow to press a key to boot from CD/DVD b) It works! KonMan.

10th April 2011, 9:09 PM	#6
KonMan Member Join Date: Jun 2001 Location: Melbourne Posts: 471	Linkin - a verry good point. Before I assume (and post) anything again, I will google it!! Cheers, konman