Here I am again, 4 years on from my original PC build post (
https://forum.giga-byte.co.uk/index.php?topic=18601.0) and asking a similar question because the Gigabyte BIOS doesn't seem to be doing what it should and the Gigabyte manuals don't appear to reflect reality!
My PC has been running in Legacy BIOS mode for 4 years and I had 2 disks configured in a RAID 1 array. All drives used MBR. Everything was good!
The Windows 11 update checker, told me I needed Secure Boot and TPM 2.0, so I read up and figured out how to change these BIOS settings.
This involved converting my disks from MBR to GPT and switching from Legacy BIOS to UEFI. Eventually, I managed to do all of this, however, my RAID 1 array has been lost during the process and my PC now shows two separate disk drives, rather than the single "mirrored" drive.
So, I downloaded the Gigabyte RAID manual and followed the rather clumsy instructions. Everything went okay, until rebooting when I received an error saying "INACCESSIBLE BOOT DEVICE". Tried again, but this time switched the Sata Mode back to AHCI (which the instructions don't mention) and it successfully booted into Windows. However, the RAID 1 array hasn't been created!
I have tried following the instructions 3 times and although everything appears to work, the RAID 1 array is never visible in Windows, so something is going wrong. I even tried changing my BIOS settings back to use Legacy BIOS, but still can't get the RAID 1 array to build.
What is going on Gigabyte?
My PC is on the latest version of the BIOS: F9e, dated 3/9/18
I am fully up-to-date with Windows 10, build 19044.
For what it's worth, the Gigabyte RAID manual I followed can be found here:
https://download.gigabyte.com/FileList/Manual/mb_manual_200series-raid.pdfI followed this manual, with a few additions (to ensure things worked) as follows:
B. Configuring SATA controller mode in BIOS SetupStep 1:
In Peripherals\SATA And RST Configuration, change SATA Mode Selection from "AHCI" to "Intel RST Premium With Intel Optane System Acceleration"
Step 2: Follow UEFI RAID Configuration steps in C-2.
C-2 UEFI RAID ConfigurationStep 1: (this was previously done as part of setting up Secure Boot)
Step 2...: In Peripherals\ Intel Rapid Storage Technology create the RAID array as required. Note this Peripherals option is only shown if I reboot and go back into BIOS after changing the SATA Mode (as far as I can remember).
After saving changes and restarting, the PC wouldn't boot, presumably because it was no longer in AHCI mode. No mention of this in the instructions. So, changed back to AHCI and rebooted again (the BIOS was showing the RAID 1 array had been created). In Windows, no sign of the RAID array, just two separate disks!
Tried the above again, but this time used the EZ RAID facility to create the RAID 1 array. Again, after creating the RAID 1 array and checking it via the Intel Rapid Storage Technology, changed the SATA Mode back to AHCI and rebooted into Windows. Still no RAID array.
I'm now at a loss as to what I'm doing wrong, having followed the instructions and apparently creating the array each time, only to find it doesn't exist in Windows!
Note: My PC comprises of a NVME, onto which the OS is installed and this is what is used for booting when SATA Mode is set to AHCI. While set to AHCI, it isn't possible to create a RAID array. When SATA Mode is set to "Intel RST Premium With Intel Optane System Acceleration" I can create the RAID array, but if left at this setting, I cannot boot into Windows as the NVME isn't listed in the boot list. So, in order to create the RAID array, I have to change SATA Mode to "Intel RST Premium With Intel Optane System Acceleration", then create the array, then change SATA Mode back to AHCI, then reboot.
I recall having to do something similar to this when I first built the PC, but back then, the RAID array was created successfully. Now, although BIOS implies the array has been created, it doesn't exist in Windows.
Any thoughts on why this isn't working?