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RE: Boot dell in uefi mode from usb stick


From: John Frankish
Subject: RE: Boot dell in uefi mode from usb stick
Date: Wed, 13 Jun 2012 22:55:55 +0000

> > -----Original Message-----
> > From: address@hidden [mailto:grub-
> > address@hidden On Behalf Of John
> > devel-bounces+Frankish
> > Sent: Monday, June 11, 2012 8:38 PM
> > To: address@hidden
> > Subject: Boot dell in uefi mode from usb stick
> >
> > I'm not sure if this is possible, but I've been trying to boot a dell
> > laptop (latitude e6220) in uefi mode from a usb stick without success.
> >
> > Using:
> >
> > $ sudo grub-install --target=x86_64-efi --boot-directory=/mnt/sdc1/efi
> > --removable Installation finished. No error reported.
> >
> > ..but on booting the dell in uefi mode, no bootable device is found.
> > Needless to say, it will boot from a usb stick in legacy bios mode.
> >
> > Does anybody know if the above is possible?
> >
> >
> On a USB stick, the grub executable might need to be at exactly
> /EFI/BOOT/BOOTx64.EFI (and the partition must be FAT of course).  See
> section 3.4.1.1 of the UEFI 2.1 spec.  You could probably just copy the grub
> executable to that location from wherever it is.
> 
> 
In fact the issue seems to have been that the usb stick was partitioned with 
fdisk.

When I used gdisk to partition the usb stick, grub automatically created 
BOOTX64.EFI, rather than grub.efi, and the
usb stick was recognized in uefi boot.

Thanks for the suggestion



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