It appears the second M.2 slot isn't being recognized by Windows, though it's visible in the BIOS.
It appears the second M.2 slot isn't being recognized by Windows, though it's visible in the BIOS.
The setting should function properly. No bios options block it, and it may operate at reduced performance. You can verify it in the Disk drives section of Device Manager.
Manager only displays the primary C partition, while the Disk Management tool shows just the boot drive. The BIOS lists two 1TB SSDs, possibly indicating a mismatch. Updating the BIOS might help. If you have any remaining hair, I’ll pull it out.