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I have installed Windows 7 on my PC (Gigabyte ga-p55-ud5) with the SATA controller set on RAID mode. I9000 bootloader download mode. After that, I've decided to try to install Mac OS X and to do so I had to set my SATA controller to AHCI.
Windows 7 only starts if I set it to RAID, Mac OS X only if I set it to AHCI.
Is there any way to let Windows 7 boot in AHCI mode without installing it from scratch?
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slhckJan 07, 2014 How to install an AHCI SATA driver in Windows XP, Vista and Win7. Discussion in 'Mac Pro' started by gugucom, Aug 6, 2009.
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3 Answers
Windows 7 doesn't have AHCI drivers loaded by default. Boot with raid, then enable the AHCI drivers then restart and enable AHCI in the bios.This KB explains how to., but is not a complete guide.
See this page for additional suggestions if the MS article does not work for your situation.
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jdhjdh
The problem is that you installed Windows 7 while in raid mode. If you had installed it while the motherboard was in AHCI mode.
![Ahci Ahci](/uploads/1/2/6/0/126029136/989473008.png)
I do not have links, but in my experience, when changing the mode in bios it prompts you about that issue and I have had booting issues when it wasn't set to the mode the OS was installed in.
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You can also just boot into Safe Mode. Windows will automatically reenable the AHCI drivers. You will then be able to boot normally. This applies to Windows 10 as well.
Windows Ahci Drivers
EricSEricS
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What Is Sata Ahci Driver
I have had a Mac Pro 2,1, for some time, that I was never able to successfully achieve AHCI mode under Windows with and just recently purchased a 5,1. What are the chances the newer hardware would affect the relative ease of achieving this? I'd love to still be able to use the Bootcamp Control Panel as my primary boot disk is Windows, but was put off by the amount of time I spent NOT getting it to work last time. I have a copy of both Windows 7 & 8 x64, if either would be a better candidate.
The instructions seem rather long and convoluted, anywhere I've found them. From my own personal experience changing the disk mode after installing Windows even on a Windows machine is a problem. But that's likely an issue the MBR patch resolves. What are the chances you could patch the MBR of an NTFS formatted disk prior to installing Windows, letting Windows install the AHCI drivers for you during the OS install after being forced into AHCI mode by the patched MBR?
The instructions seem rather long and convoluted, anywhere I've found them. From my own personal experience changing the disk mode after installing Windows even on a Windows machine is a problem. But that's likely an issue the MBR patch resolves. What are the chances you could patch the MBR of an NTFS formatted disk prior to installing Windows, letting Windows install the AHCI drivers for you during the OS install after being forced into AHCI mode by the patched MBR?