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AHCI and windows XP


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#1 btcomm

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Posted 28 November 2012 - 03:28 AM

I have a new SSD from what I understand it's best to run it in AHCI. I found this page http://www.tomshardware.com/forum/254925-32-ahci-option-sata

It sounds simple enough to get windows xp to see AHCI except when I go to that area of the registry HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\msahci does not exist. Is there some update I need to to for windows to where it will put that in my registry? I have sp3 installed but no updates after that do I need to install all further windows updates to add that key? Does sp3 have what it takes I would just have to add it manually?

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#2 Platypus

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Posted 28 November 2012 - 03:47 AM

As it says in the topic, those instructions are for Vista or later, which have native AHCI drivers. To be able to operate a SATA drive with XP, you'll need to obtain the XP SATA drivers for your SATA controller. Unless the SATA is on an expansion board, this will mean identifying which motherboard controller the drive will be using (or the board may have only one controller), downloading and installing the SATA driver. Then when the BIOS setting is changed to AHCI, the SATA driver will be present to let Windows access the drive.

If you need further assistance to source the appropriate drivers, let us know the details of the computer system, or publish a snapshot using Speccy.

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#3 btcomm

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Posted 28 November 2012 - 04:25 AM

As it says in the topic, those instructions are for Vista or later, which have native AHCI drivers. To be able to operate a SATA drive with XP, you'll need to obtain the XP SATA drivers for your SATA controller. Unless the SATA is on an expansion board, this will mean identifying which motherboard controller the drive will be using (or the board may have only one controller), downloading and installing the SATA driver. Then when the BIOS setting is changed to AHCI, the SATA driver will be present to let Windows access the drive.

If you need further assistance to source the appropriate drivers, let us know the details of the computer system, or publish a snapshot using Speccy.


Thanks for the reply I was being too assuming I found a post where someone with Windows XP asked for help with the same issue and that link was posted. This is an Asrock Z77 Extreme3 mobo. When chose to install all the drivers with the motherboard dvd. When I go to the device manager I see this

http://imgur.com/nUh4m

So I think the drivers are installed but it still blue screened when I set AHCI in the bios.

#4 Platypus

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Posted 28 November 2012 - 07:18 AM

It does seem that the requisite drivers are present. Unless someone else can suggest a better idea, I've only found a couple of possibilities, firstly see if the drivers from ASRock are later than those already installed, if so try them:

http://www.asrock.com/MB/overview.asp?cat=Download&os=XP&Model=Z77%20Extreme3

Or what seems fairly complex - a manual driver setup, as detailed in the final post for a Z77 motherboard here:

http://superuser.com/questions/427340/how-to-enable-ahci-in-windows-xp-without-reinstalling

I can't personally vouch for the information, and as it involves registry operations, it would be important to first backup the registry - for example using ERUNT:

http://www.bleepingcomputer.com/download/erunt/

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