SSD Disappeared from Boot

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8 Sep 2005
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London, UK
Hi,

I have recently completed a new PC build where Windows is installed on a NVME SSD and a secondary drive is configured on two 5TB HDDs in RAID 0, configured through the motherboard RAID config.

For the last few weeks it has otherwise been running smoothly, but a few days ago I had to perform a hard shutdown when the PC locked up. Upon switching it back on, the SSD has disappeared as a bootable option. The only boot option is "Windows Boot Manager (AMD-RAID)" which if you select gives the error "B1InitializeLibrary failed 0xc00000bb".

The RAID config still lists all the drives and if you change the SATA mode to AHCI the SSD shows up as a bootable option again but disappears when you switch back to RAID.

I've attempted to reset the CMOS but end up with the same results. I'm not sure what else to try as this has me stumped. Has anyone else seen anything like this?
 
Kind of. You can select it and it starts to boot into Windows, but eventually blue screens with a "boot device inaccessible" error. I presume because it's attempting to boot using the RAID drivers.
 
wondering if the Boot section has been moved to HDD by some chance .

Had that happen to myself , Windows installed on 256GB NVMe and then games drive was 500GB- Part of boot was moved to the Games SSD.

Not sure if @GIGA-Man has come across your situation
 
That actually worked, thanks!

I had to switch "Storage Boot Option Control" from "UEFI Only" to "Legacy Only". I have no idea why, as it had been happily working with "UEFI Only" for the last two weeks.
 
What happens is the mbr/gpt can sometimes split across both drives as orbital walsh said above and as hdd are classed as legacy, this will stop the mbr/gpt from being written in part on the hdd when legacy in enabled. Even newer ones on most modern mobo's are seen as legacy. For some uefi works fine but most have issues that I have come across. Either way glad it worked.
 
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