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Re: Possibly erroneous "device not present" message during boot

Le 18/04/2017 à 21:14, Brian a écrit :

However, my main point was that the kernel
identifying a card as a /dev/sdX disk does not imply it will necessarily
be visible to GRUB and bootable by it.

If the card reader is idendified as /dev/sdX, then it probably behaves as a generic USB mass storage device and most BIOS can see it.