AHCI

> Enabling AHCI in a system BIOS with Windows Vista already
> installed will result in a BSOD if SATA has been running in IDE
> mode during Vista's installation. Before enabling AHCI in the BIOS,
> users must first follow the instructions found at Microsoft Knowledge
> Base article 922976.
>
> Error message when you start a Windows Vista-based computer
> after you change the SATA mode of the boot drive:
> "STOP 0x0000007B INACCESSABLE_BOOT_DEVICE"
> http://support.microsoft.com/kb/922976
>
> --
> Carey Frisch
> Microsoft MVP
> Windows Shell/User
>
> ---------------------------------------------------------------
>
> "Sebastian Vega" wrote:
>
> Hello!
>
> I bought a PC with Vista Home Premium preinstalled and an intel G33
> chipset.
> However, SATA mode in BIOS was set to IDE. If I set it to AHCI or RAID, I
> would get a BSOD.
> So I enabled AHCI driver in Vista in the registry, with no success. I also
> tried installing intel Matrix drivers, but the installer says my system
> does
> not meet minimum requirements.
> So what do I have to do now to enable AHCI/RAID mode on an installed
> system?
> Thanks
> Sebastian
>

> Hello!
> I bought a PC with Vista Home Premium preinstalled and an intel G33
> chipset.
> However, SATA mode in BIOS was set to IDE. If I set it to AHCI or RAID, I
> would get a BSOD.
> So I enabled AHCI driver in Vista in the registry, with no success. I also
> tried installing intel Matrix drivers, but the installer says my system
> does not meet minimum requirements.
> So what do I have to do now to enable AHCI/RAID mode on an installed
> system?
> Thanks
> Sebastian
>
>

> Silly question but did you enable the registry key with a 1 or 0? Usually
> enabling is a 1 but in this case enabling needs a 0 value. Also you might
> see what driver is currently installed for the HDD controller. Also check
> for the presence of system32\drivers\msahci.sys.
>
>
> "Sebastian Vega" <nospam@devnull.org> wrote in message
> news:30D1FABC-3CBE-4EB8-A306-5A94C85185FE@microsoft.com...

>> Hello!
>> I bought a PC with Vista Home Premium preinstalled and an intel G33
>> chipset.
>> However, SATA mode in BIOS was set to IDE. If I set it to AHCI or RAID, I
>> would get a BSOD.
>> So I enabled AHCI driver in Vista in the registry, with no success. I
>> also tried installing intel Matrix drivers, but the installer says my
>> system does not meet minimum requirements.
>> So what do I have to do now to enable AHCI/RAID mode on an installed
>> system?
>> Thanks
>> Sebastian
>>
>>

>
>

> msahci.sys is present and yes, i set the registry key to 0...
>
> "John" <me@myhome.net> wrote in message
> news:#PtAzrbEIHA.5208@TK2MSFTNGP04.phx.gbl...

>> Silly question but did you enable the registry key with a 1 or 0? Usually
>> enabling is a 1 but in this case enabling needs a 0 value. Also you might
>> see what driver is currently installed for the HDD controller. Also check
>> for the presence of system32\drivers\msahci.sys.
>>
>>
>> "Sebastian Vega" <nospam@devnull.org> wrote in message
>> news:30D1FABC-3CBE-4EB8-A306-5A94C85185FE@microsoft.com...

>>> Hello!
>>> I bought a PC with Vista Home Premium preinstalled and an intel G33
>>> chipset.
>>> However, SATA mode in BIOS was set to IDE. If I set it to AHCI or RAID,
>>> I would get a BSOD.
>>> So I enabled AHCI driver in Vista in the registry, with no success. I
>>> also tried installing intel Matrix drivers, but the installer says my
>>> system does not meet minimum requirements.
>>> So what do I have to do now to enable AHCI/RAID mode on an installed
>>> system?
>>> Thanks
>>> Sebastian
>>>
>>>

>>
>>

>Enabling AHCI in a system BIOS with Windows Vista already
>installed will result in a BSOD if SATA has been running in IDE
>mode during Vista's installation.