Anyone enabled AHCI after Win7 install?

[de8212]

Ran across this and am thinking of doing it. Anyone else done similar?




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[KeypoX]

yep same as vista. Im not doing it though because my dvd burner isnt compatible. But i have before, just change regedit, reboot and change in bios. Very simple and effective.

 

[de8212]

Originally posted by: KeypoX
yep same as vista. Im not doing it though because my dvd burner isnt compatible. But i have before, just change regedit, reboot and change in bios. Very simple and effective.

Hmmm, dumb question but how do I tell if my dvd burner is compatible? I have a total of 4 drives (2 internal, one external, one optical) that are all SATA. I assumed all would be OK to run under AHCI???

 

[KeypoX]

Originally posted by: de8212

Originally posted by: KeypoX
yep same as vista. Im not doing it though because my dvd burner isnt compatible. But i have before, just change regedit, reboot and change in bios. Very simple and effective.

Hmmm, dumb question but how do I tell if my dvd burner is compatible? I have a total of 4 drives (2 internal, one external, one optical) that are all SATA. I assumed all would be OK to run under AHCI???

i dunno you can prob check the manufacture website spec sheets? But just trying it would be best. Also google, that cd club freaks has ample info on dvd burners. I think most newer sata drives have it. Mine is fairly old.

But the way i know is that it doesnt work when ahci is enabled. In windows with ahci enabled it doesnt even show up, however in mac it shows up for a little bit then locks up, but i am able to install mac with ahci enabled, via dvd. In linux it just doenst show up.

Hmm maybe i just need a driver. Or new firmware... gonna try the updated firmware.

 

[KeypoX]

sweet man hte updated firmware made my dvd burner work in windows with ahci, or maybe i was just the magic of 7 lol

Edit: Glad i didnt buy another dvd burner lol.

 

[soonerproud]

Yup, I am running AHCI on my 790GX motherboard using the built in AHCI drivers in Win 7 because they perform better than the drivers from AMD.

 

[de8212]

Originally posted by: soonerproud
Yup, I am running AHCI on my 790GX motherboard using the built in AHCI drivers in Win 7 because they perform better than the drivers from AMD.

did you enable AHCI after you installed 7?

 

[BonzaiDuck]

Originally posted by: de8212

Originally posted by: soonerproud
Yup, I am running AHCI on my 790GX motherboard using the built in AHCI drivers in Win 7 because they perform better than the drivers from AMD.

did you enable AHCI after you installed 7?

Interesting that you folks bring this up on such a recent and current thread in the "OS" forum. Earlier today, I was trying to extend my knowledge of "new motherboard and BIOS stuff" to set up a P45-with-Wolfdale system. It already had the RC1 of Windows 7, and was already configured in "IDE" mode instead of "AHCI" mode.

It seemed like a matter of seconds before I hooked a Wikipedia article which explains the problem -- the same problem addressed by the procedure in DE8212's link.

 

[imported_Salamander]

I currently have "IDE" mode, and I would like to switch to "AHCI" mode when I install the final Windows 7 in October. I am also switching from my current 32 bit system to 64 bit.

I don't want to use the above method. How do I change the bios settings before I do the new install?

 

[soonerproud]

Originally posted by: de8212

Originally posted by: soonerproud
Yup, I am running AHCI on my 790GX motherboard using the built in AHCI drivers in Win 7 because they perform better than the drivers from AMD.

did you enable AHCI after you installed 7?

Yes

 

[BonzaiDuck]

Originally posted by: soonerproud

Originally posted by: de8212

Originally posted by: soonerproud
Yup, I am running AHCI on my 790GX motherboard using the built in AHCI drivers in Win 7 because they perform better than the drivers from AMD.

did you enable AHCI after you installed 7?

Yes

And that's the problem with changing the BIOS. At least -- under XP or VISTA -- the BIOS change to AHCI results in BSODs and a totally inoperable OS installation that requires a completely new install.

Someone else -- Salamander -- asked "How do I change the BIOS?"

It depends on the chipset. I've been working mostly with nVidia chipsets, and there's nothing explicit in the BIOS setup menu that uses the acronym "AHCI." Instead, it would be implicit in the over-arching configuration of all drives under the SATA controller as "RAID enabled." Within that configuration, you would then just choose which drives were part of a RAID array (if any), and which are to be used separately.

With the Intel chipsets -- I've got a P45 I'm working with here (see my thread on Windows 7 and a change of chipsets) -- and that's what prompted my little web-query for some quick catch-up research. OF COURSE we want to implement NCQ and hot-swap-capability! OF COURSE! I just wish I'd known these implications when I set up the boot-drive before OS installation.

It's explicit in the newer Intel chipsets -- "IDE mode" versus "AHCI mode." And if the BIOS was initially configured as IDE mode followed by an OS installation, then the AHCI/RAID drivers were not installed with the OS.

 

[KeypoX]

Originally posted by: BonzaiDuck

Originally posted by: soonerproud

Originally posted by: de8212

Originally posted by: soonerproud
Yup, I am running AHCI on my 790GX motherboard using the built in AHCI drivers in Win 7 because they perform better than the drivers from AMD.

did you enable AHCI after you installed 7?

Yes

And that's the problem with changing the BIOS. At least -- under XP or VISTA -- the BIOS change to AHCI results in BSODs and a totally inoperable OS installation that requires a completely new install.
.

No it doesnt thats the whole point of this thread, that you can change mode ot ahci after install. But you need to change the registry first, before you change in bios.

Xp i dunno if you can do this, but i think you can.

 

[flexy]

works flawlessly...done that registry "hack" under V already..and now i just did it under Win7 and running my SSD in AHCI now. The advantage is that this "hack" also allows you to switch between AHCI/IDE now in Bios easily.

 

[Majic 7]

It is a lot easierAccording to this thread the registry hack works for some on XP and not for others. http://forums.pcper.com/showthread.php?t=444831 Pretty long thread. It is a lot easier on Vista and 7.