How to boot from a drive not seen at startup?

Help with issues regarding installation of Debian

How to boot from a drive not seen at startup?

Postby casemod » 2019-12-31 15:52

I run a linux installation on a USB SSD HDD. One of my machines has USB 3.0 through an add on PCIEx Card, which is not seen through the bios, so I am unable to boot from it. I wonder if there was a way to load grub and the USB driver from some flash drive and then carry on booting from the hard drive attached to the USB 3.0 ports?
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Re: How to boot from a drive not seen at startup?

Postby p.H » 2019-12-31 16:35

AFAICS, GRUB has no native xHCI driver for USB 3 controllers. So unless you use some other boot loader which has a native xHCI driver, the only option I see is to put /boot on a bootable drive. This includes GRUB, the kernel image (vmlinuz-*) and the initramfs (initrd.img-*).
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