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Windows 7: AHCI problems

09 Dec 2009   #11
Jonathan_King

Windows 7 Professional x64
 
 

Quote   Quote: Originally Posted by wallyinnc View Post
Good point, some motherboards have featues that won't work on all SATA connections (sometimes only SATA 0 to 2 for example). JK, have you checked that?
What do I check? My MB is supposed to be fully SATAII compatible.


My System SpecsSystem Spec
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09 Dec 2009   #12
wallyinnc

Windows 7 x64 finally!
 
 

Check your MB manual and see if they have different things supported in different SATA connectors.
My System SpecsSystem Spec
09 Dec 2009   #13
Jonathan_King

Windows 7 Professional x64
 
 

I see now, looking through my MB manual, I need to create a driver diskette after enabling AHCI. Unfortunately, I do not have a floppy drive. More Google searching, I guess.
My System SpecsSystem Spec
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09 Dec 2009   #14
ignatzatsonic

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit
 
 

NCQ is normally listed as part of the HD specifications as supplied by the manufacturer, but I don't know if the lack of it would mean that you could not implement AHCI.
My System SpecsSystem Spec
09 Dec 2009   #15
erica647

windows 7 Ultimate x64
 
 

The following is something I was able to do on an earlier Vista build and it seemed to work fine. Just install your sata drives with the bios set to ide mode and do the following:

1. Exit all Windows-based programs.
2. Click Start, type regedit in the Start Search box, and then press ENTER.
3. If you receive the User Account Control dialog box, click Continue.
4. Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci
5. In the right pane, right-click Start in the Name column, and then click Modify.
6. In the Value data box, type 0, and then click OK.
7. On the File menu, click Exit to close Registry Editor.

Then just reboot to your bios and change back to AHCI mode. Windows should come up and recognize the new mode which you can confirm in device manager.
My System SpecsSystem Spec
09 Dec 2009   #16
Jonathan_King

Windows 7 Professional x64
 
 

Quote   Quote: Originally Posted by erica647 View Post
The following is something I was able to do on an earlier Vista build and it seemed to work fine. Just install your sata drives with the bios set to ide mode and do the following:

1. Exit all Windows-based programs.
2. Click Start, type regedit in the Start Search box, and then press ENTER.
3. If you receive the User Account Control dialog box, click Continue.
4. Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci
5. In the right pane, right-click Start in the Name column, and then click Modify.
6. In the Value data box, type 0, and then click OK.
7. On the File menu, click Exit to close Registry Editor.

Then just reboot to your bios and change back to AHCI mode. Windows should come up and recognize the new mode which you can confirm in device manager.
Hmm... I will test it. Welcome to the Forums!
My System SpecsSystem Spec
09 Dec 2009   #17
gregrocker

 

You may need to have the AHCI driver off the mobo CD or from their Support>Downloads page for your mobo model. This was true in a case here yesterday.

Put it into the installer from stick/CD on the Add Drivers link at Custom> Drive selection screen. Or tap F6 during driver loading to see if you can get it in earlier.

If you have WIn7 on the computer now, AHCI should be the SATA driver you are using if mobo is AHCI capable and set AHCI. Check the Device Manager.

The debate here recently on AHCI seemed to point to no real advantage.
My System SpecsSystem Spec
09 Dec 2009   #18
Jonathan_King

Windows 7 Professional x64
 
 

Quote   Quote: Originally Posted by gregrocker View Post
I believe you need to have the AHCI driver off the mobo CD or from their Support>Downloads page for your mobo model.

Put it into the installer from stick/CD on the Add Drivers link at Custom> Drive selection screen. Or tap F6 during driver loading to see if you can get it in earlier.

If you have WIn7 on the computer now, it should be the SATA driver you are using if you're mobo is AHCI capable and set that way.
Somehow it is fixed. Could be I installed from a DVD instead of a thumb drive, or it could be I stuck the drivers on the thumb drive, and Setup found them when it installed.
My System SpecsSystem Spec
09 Dec 2009   #19
gregrocker

 

Quote   Quote: Originally Posted by Jonathan_King View Post
Somehow it is fixed. Could be I installed from a DVD instead of a thumb drive, or it could be I stuck the drivers on the thumb drive, and Setup found them when it installed.
What is shown in the Device Manager under SATA controller?
My System SpecsSystem Spec
09 Dec 2009   #20
Jonathan_King

Windows 7 Professional x64
 
 

I'm not sure. I will post back later when I boot from that HD again. I installed it just to see if it would work. Now I am using my main OS again.
My System SpecsSystem Spec
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