Hard drive unable to boot in ACHI

[dtk297]

I recently installed the MSI Z170a so now the only boot option is ACHI/Raid. Before I installed the new mb, my old mb was on ATA. My hdd has win7 installed but I never installed new updates. Everytime window tries to startup, I get 0x0000007B BSOD. I'm not sure what to do to fix this other than reinstalling windows which I really wish to avoid.

 

[Multipack]

Try disabling Fast Boot and Windows 8.1/ 10 WHQL Support and change boot mode to legacy

 

[dtk297]

Both are disabled but I still get the same BSOD. If it helps I don't hear my motherboard POST. I tried running in safemode but BSOD happens.

 

[Multipack]

You need to reinstall the OS. Its almost certainly not going to work in a new system anyway.

 

[dtk297]

I installed Windows 7 on a fresh hard drive which allows me to access my old hard drive. From there, how would I install the AHCI drivers onto my old hard drive? I would edit the Start DWORD value on the msahci key in the registry but since I'm on a new OS, I'm not sure how to proceed from there.

 

[Multipack]

You dont install AHCI drivers onto a disk. Its part of the firmware. Am not sure what you are trying to do. Use an old OS? What isnt working?

 

[dtk297]

I really wish to continue using my old hard drive as the main OS so I want to switch it from IDE to AHCI. I'm not really sure if the AHCI drivers are installed or not but what I've read online is that if I edit the msahci key in HKLM hive and set the Start value to 0, it'll switch the drive to AHCI mode. Besides wondering if it'll actually work, I'm not sure how I would edit the registry of my old OS on the new one since when I use regedit, it'll only show the registry of the new OS.

 

[Multipack]

You need specific drivers for different chipsets, and unless you have an identical board to your last one there will be a ton of compatibility issues. It's not the drive that needs to be changed from IDE to AHCI, it's the OS configuration on the drive.

Believe me, only a clean install will work.