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AHCI Mode for SSD

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August 8, 2013 4:46:03 PM

Earlier I was asking about installing Win 7 on a new SSD. Worked great but I forgot to Configure SATA as AHCI in the Bios.

I tried to do it after the fact and got a quick blue screen when I tried to boot. I rebooted and reset to IDE. Once I booted to XP once I was able to reboot the SSD in IDE mode and all is back to "normal", although I gather at a performance disadvantage for the SSD.

Question: Do I need to start over again?

Will changing to AHCI from IDE affect my current XP install on the other hard drive?

Any other advice you can give as to how I should proceed?

More about : ahci mode ssd

a c 77 V Motherboard
August 8, 2013 4:50:25 PM

XP doesn't provide AHCI support out of the box, you can download some drivers for it to make it work (probably why the BSOD) then i think you should be able to switch it fine. These people had some good thoughts:

http://superuser.com/questions/427340/how-to-enable-ahc...

If you don't do that, i don't think you'll be able to boot your XP drive.

With Windows 7, you need to enable AHCI mode in the OS before you reboot and change it in the BIOS, see this KBA:

http://support.microsoft.com/kb/922976
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a b V Motherboard
August 8, 2013 4:52:21 PM

From my experience, on Windows 7 and Windows 8 you need to reformat and re install your OS when you switch modes.
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a b V Motherboard
August 8, 2013 4:53:05 PM

You can definitely change this setting without issue. I just did it on my computer last week. Follow step one on this page http://thessdreview.com/ssd-guides/optimization-guides/... to change a registry key in Windows 7, then reboot and turn on AHCI in your BIOS. I recommend following the whole guide to increase performance, and improve the lifespan of your SSD.

As for how this will affect XP (Iassume in a dual boot scenario), that I can't say. It's possible that a similar registry key exists that would need to be changed there prior to changing the BIOS settings as well, but I've never done it so I'm not 100% certain. This page may give you some more insights into what that would entail http://superuser.com/questions/427340/how-to-enable-ahc...
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August 8, 2013 5:16:47 PM

Cool. Looks like all the answers are here, including a workaround for XP. I'm not sure I'll need to continue booting to XP for long anyhow. I'll let you all know how it goes.

It's great to have all of you as a resource for those of us who don't think about this stuff every day. (I'm just trying to get my work done more efficiently). I wouldn't even know exactly how to search for these kinds of answers, so thank you!
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a c 77 V Motherboard
August 8, 2013 5:23:25 PM

eddy55 said:
Cool. Looks like all the answers are here, including a workaround for XP. I'm not sure I'll need to continue booting to XP for long anyhow. I'll let you all know how it goes.

It's great to have all of you as a resource for those of us who don't think about this stuff every day. (I'm just trying to get my work done more efficiently). I wouldn't even know exactly how to search for these kinds of answers, so thank you!


I'm not sure which version of Windows 7 you're using, but if it's Pro or above, just install XP mode (free) and be done with the separate booting. It's a free copy of XP that goes with the Windows Virtual PC application (also free if you're pro or above) and runs virtually. It works really well for XP needs. Then you can just install it when you don't need it anymore, and re install it as needed without going through the time and pain of an actual OS install
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August 8, 2013 5:32:07 PM

Thanks for that suggestion. I am running pro 7 and can use that as I move along (I have in the past on other computers) but for now it's about migrating applications settings and making sure everything is running smoothly. My current XP install is working great and has been for many years now. At the time of the build I originally envisioned an ssd drive with 16gb of RAM, which is what I've got now but at the time XP was the only workaround for certain things I needed to do on a daily basis (Not all x86 programs or their resident plugins play nice in virtual XP). Anyhow, I've since implemented newer software solutions and thus, the upgrades.

Thanks again for all the help!
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