Hello,

Is there anyone able to help me with changing the SATA Controller mode from RAID to AHCI (in BIOS) after install without having to re-install Windows 8?

I am suspecting Intel RAID controller to be causing some problems with system stability and would like to move to software RAID (storage space) in Windows 8 and give it a try.  When I change the BIOS settings from RAID to AHCI in the SATA controller mode, Windows 8 wont boot and running a system repair will not do neither.

I found this KB, but it is for Windows 7 and wont run on Windows 8 Anything similar for Windows 8?

http://support.microsoft.com/kb/922976

A bit of details about the system:

System: Windows 8 pro 64
Primary HD (OS Only + bitlocker): Intel SSD 520 240 Gb
Data HD (user files +bit locker): 2x WD RED 2T running in RAID 1
Motherboard RAID Controller: Intel DP55WB -  latest BIOS and Intel RST 11.6.1030 driver

Thank you.

/David

In Win8, the key MSAHCI is renamed to StorAHCI. Look at this key and set the value there.

Thank you for your reply and sorry for the long delay for mine. I Finally had some time today to try the option proposed. Setting the START registry under StorAHCI to 0 did not do for me. I am still having the INACCESSIBLE_BOOT_DEVICE when changing to AHCI in BIOS...

Anything else to consider?

Thank you

/David

also change the start type in the Intel driver key.

- Run msconfig (right click far left bottom corner of desktop then left click run, type msconfig).

- Click boot tab, mark safe boot, restart, change to AHCI in BIOS, boot, Windows boots in safe mode.

- Run msconfig again, boot tab unmark safe boot, restart PC.

- PC works fine. Don't mess with regedit you only need to boot in safe mode to fix this, very simple.