[blfs-support] Failed to boot from USB stick

Richard Melville richard.melville69 at googlemail.com
Thu Mar 20 00:54:20 PDT 2014

On Wed, Mar 19, 2014 at 3:34 PM, Aleksandar Kuktin <akuktin at 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
I suggest you read the earlier posts.

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