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Windows 7: Windows 7 and AHCI - Question

02 Dec 2012   #1
Bjoern73

Windows 7 Ultimate 32bit
 
 
Windows 7 and AHCI - Question

Hi,

I have re-installed my system from scratch using Win7 Ultimate and a Samsung SSD 830 128GB.
First, I set to AHCI in BIOS-setup, then installed from DVD.
Everything seems to work fine and speedy, during Boot-up I get the message: AHCI BIOS installed.

Now I came across an article concerning AHCI-mode:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci
Start should show 0 (zero)
That is ok

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\IastorV
Start should show 0 (zero)
My setting shows 3

Question:
Should I correct the last setting from 3 to 0 or leave it as is?

Bjoern


My System SpecsSystem Spec
.

02 Dec 2012   #2
edwar

7 x64
 
 

No because you haven't loaded the Intel IAstor (Intel Rapid Storage) drivers and you are using the Microsoft versions. which is perfectly fine.
My System SpecsSystem Spec
02 Dec 2012   #3
Bjoern73

Windows 7 Ultimate 32bit
 
 

Thank you for help, edwar,
makes me breathe a bit easier

Bjoern
My System SpecsSystem Spec
.


02 Dec 2012   #4
Kaktussoft

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
 
 

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\IastorV is microsoft version
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Iastor is intel version

Because IastorV is not 0 in your case, I assume Iastor is 0(?) So you're using Iastor ... so the intel version
check device manager... IDE ATA/API-controlers
My System SpecsSystem Spec
02 Dec 2012   #5
Bjoern73

Windows 7 Ultimate 32bit
 
 

Thank you for additional info.

There is no
...\CurrentControlSet\Services\iaStor
entry in my registry.

Only the
...\CurrentControlSet\Services\iaStorV

Device Manager seems to be ok,
at least there are no yellow markings.
My System SpecsSystem Spec
02 Dec 2012   #6
edwar

7 x64
 
 

That is because you have a AHCI driver installed, the MS version. You can install the Intel Rapid Storage Technology drivers if you like.
My System SpecsSystem Spec
02 Dec 2012   #7
Bjoern73

Windows 7 Ultimate 32bit
 
 

Would RST have any noticeable effect over MS-driver?
Heard pros and cons on RST.
MS-driver was generally rated as very stable.
My System SpecsSystem Spec
02 Dec 2012   #8
edwar

7 x64
 
 

Are you having any problems with your system the way it is right now? If not then why are you trying to fix something that is not broken.

Yes the MS drivers are fine. But so are the Intel drivers.

Pick one.
My System SpecsSystem Spec
02 Dec 2012   #9
Bjoern73

Windows 7 Ultimate 32bit
 
 

You are right, edwar
No problems here and I will not tamper with the running system.

Start question was about recommended settings for msahci and iastorv
which I did not understand.

So, thank you all for putting me straight

Bjoern
My System SpecsSystem Spec
Reply

 Windows 7 and AHCI - Question




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