HOWTO: enable AHCI mode after installing Windows

[fmb]

Hi,

I just registered to share, that on Asus P5W DH Deluxe (what a CRAP!) with 975X chipset the above mentioned guide did not work with any of both suggested reg files until some ahci.reg hack (no revelation here, someone suggested it before). So here it is:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\CriticalDeviceDatabase\pci#ven_8086&dev_27C1&cc_0106]
"Service"="iaStor"
"ClassGUID"="{4D36E96A-E325-11CE-BFC1-08002BE10318}"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\iaStor]
"Type"=dword:00000001
"Start"=dword:00000000
"Group"="SCSI miniport"
"ErrorControl"=dword:00000001
"ImagePath"="system32\\drivers\\iaStor.sys"
"tag"=dword:00000019
"DisplayName"="Intel AHCI Controller"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\iaStor\Parameters]
"queuePriorityEnable"=dword:00000000

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\iaStor\Enum]
"0"="PCI\\VEN_8086&DEV_27C1&SUBSYS_B0051458&REV_02\\3&13c0b0c5&0&FA"
"Count"=dword:00000001
"NextInstance"=dword:00000001

Thanks a bunch.

[rhydster]

Hi all, wanted to share the registry settings that worked for my Intel 965 chipset with version iata82_enu.exe of the installer from Intel. It's the same in XP 32 bit and 64 bit (I have both installed).

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\CriticalDeviceDatabase\pci#ven_8086&dev_2829&cc_0106]
"ClassGUID"="{4D36E96A-E325-11CE-BFC1-08002BE10318}"
"Service"="iaStor"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\iaStor]
"Type"=dword:00000001
"Start"=dword:00000000
"Group"="SCSI miniport"
"ErrorControl"=dword:00000001
"DisplayName"="Intel AHCI Controller"
"ImagePath"=hex(2):73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,44,00,\
  52,00,49,00,56,00,45,00,52,00,53,00,5c,00,69,00,61,00,53,00,74,00,6f,00,72,\
  00,2e,00,73,00,79,00,73,00,00,00
"Tag"=dword:00000019

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\iaStor\Parameters]
"queuePriorityEnable"=dword:00000000

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\iaStor\Enum]
"0"="PCI\\VEN_8086&DEV_2829&SUBSYS_FF641179&REV_03\\3&b1bfb68&0&FA"
"Count"=dword:00000001
"NextInstance"=dword:00000001

Good luck.

[iceman81]

Will this work on a AMD platform??

780g pro/sb700?

Thanks

[BWM]

I don't think so. This thread deals with Intel ICH* southbridge chips.

[wpcoe]

Something happened last night to my Vista Business (SP1) configuration, such that I can now not boot in AHCI mode. My mobo is a P35 (Gigabyte GA-P35C-DS3R), with ICH9R southbridge. I do not get a blue-screen, nor do I get the "STOP 0x0000007B" message address in MSKB article 922976, I simply get "Disk Error, Press any key to restart" after the AHCI BIOS initializes.

The most recent "change" I made to my system before it lost the ability to boot Vista in AHCI, was to boot from a CD I had created with "Partition Logic 0.69" freeware (see http://partitionlogic.org.uk/manual/vista.html -- other than a warning not to move the boot partition, it should work with Vista). Upon booting with the CD, I got a series of error messages (in a rather difficult read font, I might add: see screenshot here) The next re-boot, AHCI mode would no longer work.

So, the entire problem may not be related to any registry hacks or tweaks. Maybe Partition Logic farkled something? But, I can boot normally if I disable AHCI, so I'm not sure it's a disk and/or partition problem.

Having said all that, I've tried multiple permutations of the reg hacks suggested above. I suspect the OP's reg hack is closest to my scenario, as it is applicable to P35 mobos. However, it is for WinXP, and I have Vista. BTW, when I went to move iaStor.sys to the C:\windows\system32\drivers\ directory, it was already there with the same date stamp and file size.

Now for a bunch of questions:

(1) Should the OP's first reg hack (step 3) work in Vista for a P35 board?

(2) Is it better to use the Intel iaStor.sys driver, or Microsoft's msahci.sys? (I've tried both, to no avail)

(3) I notice varying "device" numbers, e.g. pci#ven_8086&dev_2922&cc_0106 and pci#ven_8086&dev_2829&cc_0106 -- how do I determine what number to use? In Device Manager, when booted in non-AHCI, Device Manager shows my S-ATA controllers as 2926 and 2920 -- I've tried substituting those numbers in the reg hack to no avail. (And, what does the "&cc_0106" designate?)

The OP used Intel Matrix Storage Manager (7.6.0.1011, 8/2/2007) and his hack includes the lines:

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\iaStor\Enum]
"0"="PCI\\VEN_8086&DEV_2922&SUBSYS_B0051458&REV_02\\3&13c0b0c5&0&FA"
"Count"=dword:00000001
"NextInstance"=dword:00000001

Rhydster (on 08-17-2008 02:17 AM) used the Intel version iata82_enu.exe and his hack includes the lines:

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\iaStor\Enum]
"0"="PCI\\VEN_8086&DEV_2829&SUBSYS_FF641179&REV_03\\3&b1bfb68&0&FA"
"Count"=dword:00000001
"NextInstance"=dword:00000001

(4) What SUBSYS and/or REV should I use?

(5) The Intel version I downloaded was iata85enu.exe Do I need to change anything in the reg hack?

[vannguyen0]

I enabled AHCI in the BIOS, did a fresh install of Windows Vista x64 (did not specify specific Intel drivers... just used Vista's default). After the install finished... I installed the Intel chipset drivers and then the Intel Storage Matrix. Still no hot swapping abilities. Will this method work on an X48 board with a ICHR9 chip (specifically DFI LT X48-T2R)?

[giaschi]

I want to thank everyone for the advice given in this thread. With this advice and the advice from the thread found at http://www.dellcommunity.com/support...cending&page=3 I have finally been able to install AHCI and hot swap my drives. My system is an ASUS TS500 server with an ASUS DSBV-D motherboard. The chipset is Intel 5000V with a 6321 ESB south bridge. For anyone with a similar system the device you have to add in the registry entries for this motherboard/chipset is pci#ven_8086&dev_2681&cc_0106. Rather than doing the manual edit of the registry I downloaded the version of the intel matrix storage manager from the lenovo site which is at http://www-307.ibm.com/pc/support/si...cid=MIGR-62909. I then edited the IMSM_PRE.INF file (located in the prepare folder) in notepad by substituting 2681 for 2929 such that the device references were to pci#ven_8086&dev_2681&cc_0106. With that change, everything worked perfectly.

You all have my thanks - and, hopefully, someone may find this contribution useful

[djsaf3939]

I registered here just to give a BIG THANK YOU to Ned Slider - just FYI as of Sep 20 2008 it's the ONLY way to dual boot UBUNTU and a previously installed Winxp Home on the IP35 (as the grub loader workaround for ubuntu doesn't work 100%). I spent 4 hours banging my head on this one until this thread, THANK YOU!

[Chrisots]

(the usual intro, i just register for this post to say thank you and give something back for ICH10)

I followed the steps of the first post with IATA85ENU.exe. The registry files didn't work for me.

After following Ned Slider's post on page 7 on how to make your own .reg file, using the linux lspci -nv I was able to make the registry file for my ICH10 (Asus P5QL-E)

lspci -nv

03:00.0 0106: 197b:2363 (rev 03) (prog-if 01 [AHCI 1.0])
        Subsystem: 1043:8352
        Flags: bus master, fast devsel, latency 0, IRQ 10
        Memory at feafe000 (32-bit, non-prefetchable) [size=8K]
        Expansion ROM at feae0000 [disabled] [size=64K]
        Capabilities: [68] Power Management version 2
        Capabilities: [50] Express Legacy Endpoint, MSI 01
        Kernel driver in use: ahci

Here is the registry mod file ahci.reg:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\CriticalDeviceDatabase\pci#ven_8086&dev_3a22&cc_0106]
"Service"="iaStor"
"ClassGUID"="{4D36E96A-E325-11CE-BFC1-08002BE10318}"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\iaStor]
"Type"=dword:00000001
"Start"=dword:00000000
"Group"="SCSI miniport"
"ErrorControl"=dword:00000001
"ImagePath"="system32\\drivers\\iaStor.sys"
"tag"=dword:00000019
"DisplayName"="Intel AHCI Controller"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\iaStor\Parameters]
"queuePriorityEnable"=dword:00000000

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\iaStor\Enum]
"0"="PCI\\VEN_8086&DEV_27C1&SUBSYS_82d41043&REV_02\\3&13c0b0c5&0&FA"
"Count"=dword:00000001
"NextInstance"=dword:00000001

Thanks for the post. You saved me a format!

p.s. I have seen the usefulness of AHCI on desktop machines being debatable to the level of Flamewar on this page. Just wanted to say that for some of us it's just useful for having dual boot machines where linux doesn't cope well with IDE option unless heavily tweaked. Cheers.

[Oldarney]

i have the same problem as dexter it seems that the nvidia AHCI are harder to find instructions on how to install.

[sergiommms]

Hi

I was looking to add a RAID1 set of 2x 500GB HDD to my existing installation (Windows XP Pro SP2).

Currently, the IDE is set to IDE in the BIOS...
...whenever I try to change that to AHCI/RAID setting intead of IDE, I get the BSOD.

My mobo = Asus P5WD2 Premium (ICH7R).

Can someone here lend me a helping hand?

Many thanks in advance!

Sergio

[ptmx2]

Interesting how long this thread has been alive.

Maybe someone could answer a couple of general questions about the existing and "edited registry entries" needed to enable this change to AHCI/SATA in Windows XP_SP3 with i875P chipset with 82875P MCH and ICH5P I/O Controller.

1) Specifically; in the HKLM\sys\CCS\CS\Services\iaStore\Parameters key, the existing NAME column contains two entries: ADAPI Primary and ADAPI Secondary. Each has an associated DWord value. Do I simply delete these two entries and use the data shown in the edited for ACHI registry entries?

2) Second. In the HKLM\sys\CCS\CS\Services\iaStore\Parameters folder I do NOT have the ENUM sub-key folder. Do i simply create the folder and the edit for ACHI entries and add them to the registry???? thank you.

[stickpony]

Fortunately this is very simple with vista, a minor registry edit takes care of it.
http://support.microsoft.com/kb/922976

is there a simple registry fix for Vista for the Intel Matrix RAID controller as well?

[Ratman907]

Hey guys! I found this thread while researching my own AHCI problem.

I installed a new Maxtor SATA hard drive into my computer, but apparently did it in IDE emulation mode. This seems to be creating a conflict with an existing IDE DVD Rom drive. I've been looking for how to switch from IDE to AHCI without having to reinstall or repair Windows.

There was a previous post in this thread with a similar system to mine. I'm running Windows XP SP3 on an Asus M2A-VM HDMI motherboard. ATI SB600 chipset. I have the AHCI drivers (ahcix86) but am a little unsure as how to proceed. Any help would be greatly appreciated.

[brothergc]

Hey guys! I found this thread while researching my own AHCI problem.

I installed a new Maxtor SATA hard drive into my computer, but apparently did it in IDE emulation mode. This seems to be creating a conflict with an existing IDE DVD Rom drive. I've been looking for how to switch from IDE to AHCI without having to reinstall or repair Windows.

There was a previous post in this thread with a similar system to mine. I'm running Windows XP SP3 on an Asus M2A-VM HDMI motherboard. ATI SB600 chipset. I have the AHCI drivers (ahcix86) but am a little unsure as how to proceed. Any help would be greatly appreciated.

trust me ahci on a SB600 chipset is a no no , been their done that . Why ? The hard drive will run slower then using IDE mode