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Windows 7: AHCI : Enable in Windows 7 / Vista

11 Apr 2010   #70
Samcro

Win 7 Professional 64bit
 
 

Thanks BFK!
Everything went as described in the tutorial.
This was something I was looking to do as I had forgot to do this prior to the OS install. (1st build in many years and too many other things to check!)
My WEI, FWIW, went from 7.6,7.6,7.0,7.0,5.8 to 7.6,7.5,7.1,7.1,5.9, and boot time decreased by 5 seconds. Not meaningful changes by any means, but every bit helps especially under a full load.


My System SpecsSystem Spec
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11 Apr 2010   #71
Bare Foot Kid
Microsoft MVP

W 7 64-bit Ultimate
 
 

Hello Samcro.



I'm pleased it could be a help to you!
My System SpecsSystem Spec
13 Apr 2010   #72
architect

w7 ultimate x64
 
 
enable ahci with existing raid0

Hello to all,

here is MY problem:

i have raid0 with win7 running, all ok.
now i want to activate ahci;
if i activate it in bios, i have 4 sata drives appearing in bios,
but windows does not boot;
how can i solve this issue?

thanks!
My System SpecsSystem Spec
13 Apr 2010   #73
Jonathan_King

Windows 7 Professional x64
 
 

First, did you change the registry key first?

I suspect that if you are using hardware RAID (which you are), you need to have your setting on RAID.

If you don't mind breaking the array, you could use a software RAID, like Windows striping and mirroring.
My System SpecsSystem Spec
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13 Apr 2010   #74
architect

w7 ultimate x64
 
 

hello,
isnt it possible to have raid and ahci activated at the same time??
My System SpecsSystem Spec
13 Apr 2010   #75
Jonathan_King

Windows 7 Professional x64
 
 

Quote   Quote: Originally Posted by architect View Post
hello,
isnt it possible to have raid and ahci activated at the same time??
Sorry, architect, it's one or the other. In your BIOS, you have to choose how the computer interacts with the hard disk controller. It can't choose to both interact with it as RAID, and as AHCI or IDE at the same time.
My System SpecsSystem Spec
13 Apr 2010   #76
architect

w7 ultimate x64
 
 

thanks for the info.
My System SpecsSystem Spec
22 Apr 2010   #77
atlcraig

Windows 7
 
 

I have already installed Windows 7 some time ago and just found out about AHCI. Can I follow these setps and have AHCI working when I am done or are there other things that I must do? Also is there a chance that Windows 7 will not work if I follow all the steps? Thanks for the help, atlcraig
My System SpecsSystem Spec
22 Apr 2010   #78
Jonathan_King

Windows 7 Professional x64
 
 

Welcome!

Changing this registry setting will not hurt anything. All it does is enable AHCI, not force it.

If you want to switch to AHCI in your BIOS, you first need to enable it in Windows, or it will not boot.

No problems are foreseen; however, as always, if you have any problems, let us know, and we'll walk you through how to fix it.
My System SpecsSystem Spec
22 Apr 2010   #79
Bare Foot Kid
Microsoft MVP

W 7 64-bit Ultimate
 
 

Hello atlcraig, welcome to Seven Forums!



It's always best to create a restore point first in case of any trouble.
My System SpecsSystem Spec
Reply

 AHCI : Enable in Windows 7 / Vista




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