On Wed, Mar 19, 2014 at 3:34 PM, Aleksandar Kuktin <akuk...@gmail.com> wrote:
> Returning back to the root of the problem, can you give a bit more
> light?
>
> If you have an USB with ext2 (or whatever), you can not boot a new
> BIOS, correct? If you have an USB with FAT32, and with the exact same
> filesystem (except ownership and permissions) that the USB with ext2
> has, you can boot it?
System:
- mb: Intel Atom with ICH10R chipset
- disk: USB stick with MBR; a single etx4 partition (also have HDD
with the same config)
- grub 2.0 on mbr
- built LFS+BLFS 32bit

Original status:
- On the old mb:
   - I can boot from both USB stick and HDD
- on the same mb with updated BIOS version:
   - I can only boot from HDD (SATA port)
   - on the new BIOS with the same USB stick I can see grub menu, but
any attempt to boot results in error (see top of the thread)

> The question being, can you make a USB bootable just by switching the
> filesystem?
As I understand, grub is capable of reading ext4 (menu is shown)
At this point I wonder what causes grub to fail...

> And a thing I just came up with: does your ext2 USB have the "bootable"
> flag set on its boot partition?
I have ext4 with bootable flag (boots on working mb)

Just to clarify another problem while trying to solve initial one:
there was a suggestion to switch to gpt with a separate /boot
partition formatted as ext2 without initrd, but I can't boot linux
even on Core2 pc without initrd if rootfs is mapped via UUID.

Regards,
Alexey
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