First of all the RAID mode is useless, there's only a single drive.
Second of all the compatible hardware is supported and included with the laptop.
It's just stupid for lenovo to configure it weirdly, disable the bios and efi setting that would fix it. Potential motivation for this is to prevent users from installing microsoft windows, which would remove whatever malware/crapware they are including to track users and sell the resulting information. Not like malware hasn't been found in lenovo laptops more than once in the past.
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Second of all the compatible hardware is supported and included with the laptop.
It's just stupid for lenovo to configure it weirdly, disable the bios and efi setting that would fix it. Potential motivation for this is to prevent users from installing microsoft windows, which would remove whatever malware/crapware they are including to track users and sell the resulting information. Not like malware hasn't been found in lenovo laptops more than once in the past.