Dev1 Galaxy Forum / [solved] T460p won't boot from internal hdd

Re: [solved] T460p won't boot from internal hdd

dummy@example.com (Head_on_a_Stick) — Thu, 25 Feb 2021 14:34:06 +0000

fsmithred wrote:

has flags esp and boot (in gparted)

Those are the flags for an EFI system partition. A BIOS boot partition needs the "bios_grub" flag set in gparted.

EDIT: note that some machines won't boot in non-UEFI mode from a GPT disk even if a BIOS boot partition is present and holds GRUB's core.img.

Re: [solved] T460p won't boot from internal hdd

dummy@example.com (fsmithred) — Thu, 25 Feb 2021 14:21:13 +0000

If you want gpt with legacy bios boot, you need a special partition for grub that is at least 1MB size, has no filesystem on it and has flag bios_grub (in gparted) or type ef02 (in gdisk). Then you get the advantage of more than four primary partitions.

Edit: Fixed what I wrote in my sleep. Thanks, HoaS!

Re: [solved] T460p won't boot from internal hdd

dummy@example.com (mclien) — Thu, 25 Feb 2021 08:30:10 +0000

Well, a mix of both, I guess.
I think, I did combine 2 things incorrectly: EFi turned off in BIOS and installing with a GPT partition table. (again, btw., like my last Debian install).
I chose to turn off the EFi boot an use a mdos part table, which is working.

Re: [solved] T460p won't boot from internal hdd

dummy@example.com (fsmithred) — Wed, 24 Feb 2021 21:16:04 +0000

Is this something new that a boot partition needs to have a boot flag, or are you talking about an efi partition?

Re: [solved] T460p won't boot from internal hdd

dummy@example.com (Head_on_a_Stick) — Wed, 24 Feb 2021 15:38:19 +0000

If you are referring to the rescue mode available from the "Advanced options" GRUB submenu on the ISO image then you can use

# parted /dev/sdX set Y boot on

Replace X & Y with the required drive letter and partition number.

[solved] T460p won't boot from internal hdd

dummy@example.com (mclien) — Wed, 24 Feb 2021 12:12:20 +0000

I think i had that once, but can't remember the fix.

I installed my Thinkpad T460p without any flaw, but the new installation won't boot from the hdd.

I guess I misse dthe botable flag on the the boot partition, but there seems no fix with fdisk for that.

So how do I fix this from the (reduced) shell in rescue mode?