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ok - got it - RAID is Superset of AHCI. Fine. But why provide a option which is not usable... i.e why provide a RAID setup when there is just one HDD. There is no raid config possible on a laptop with one HDD. ????
– samshers
Commented Aug 16, 2020 at 11:39
20

@samshers: The author of the UEFI firmware has no idea how large the case will be that the motherboard that his firmware runs on is installed in. There is no way for the author of the UEFI firmware to know that the case is too small for two drives. And it doesn't make commercial sense to develop a special firmware for cases that are so small that you can fit only one drive.
– Jörg W Mittag
Commented Aug 16, 2020 at 18:07
1

There is some harm in that you have to set it to AHCI for Linux to detect the disks correctly.
– muru
Commented Aug 17, 2020 at 3:43
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@Hitek That is somewhat concerning, and makes me glad that I didn't purchase or rely on TI Travelmate products. The problem is never getting an engineer to make a change or burn a new image. The problem is performing the full quality assurance (QA) and regression testing that is required any time you make a change. Then there's the support burden that Booga mentioned. As usual, what seems trivial from a pure engineering perspective is anything but. TI certainly follows more rigorous processes today for their ICs.
– Cody Gray - on strike
Commented Aug 17, 2020 at 5:06
1

@muru That only applies to remapped PCIe/NVMe drives, and should be resolved if the patch ever lands.
– Bob
Commented Aug 17, 2020 at 6:58

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