On Mon, Mar 30, 2015 at 9:42 AM, <[email protected]> wrote:
> I'm booting Xen 4.5 on UEFI with GRUB2.
>
> For now, that requires chainloading
>
> http://wiki.xenproject.org/wiki/Xen_EFI
>
> I'm trying to get the menuentry root correct, and
> disk-position-independent.
>
> My efi partition partition is mounted at '/boot/efi'
>
> grub2-probe --target=device /boot/efi
> /dev/sdg2
> mount | grep efi | grep ^/dev
> /dev/sdg2 on /boot/efi type vfat
>
notice that it is vfat.
>
> that target dir/file on the efi partition I need to load is
>
> ls -al /boot/efi/EFI/XEN/xen.efi
> -rwxrwxr-x 1 root root 2.1M Mar 27 21:20
> /boot/efi/EFI/XEN/xen.efi*
>
> Dropping to grub2 prompt on reboot, autocomplete finds only the lowercased-
>
> set root=(hd6,gpt2)/efi/xen/xen.efi
>
> but does NOT find
>
> set root=(hd6,gpt2)/EFI/...
>
> given the REAL path of
>
> .../EFI/XEN/...
>
> but the grub2-found path of
>
> .../efi/xen/...
>
> Which path should be used in a menuentry stanza? lowercased, or not?
>
> it does not matter, vfat is by default not case sensitive ( there are some
weird exceptions )
> Next, (hd6,gpt2) this is disk-position-dependent
>
> To get/use a permanent/immutable drive-specific root in grub2, is use of
> 'device.map' (as in grub-legacy) still the right approach?
>
> It seems that in default/generated grub.cfg, *uuid-specified roots are used
>
> For this system
>
> blkid /dev/sdg2
> /dev/sdg2: UUID="94C3-29F3" TYPE="vfat" PARTLABEL="EFI Sys
> Part" PARTUUID="8456ded4-2c33-53f2-8465-5c87757d9c0a"
> find /dev/disk | egrep "94C3-29F3|8456ded4|EFI"
> /dev/disk/by-uuid/94C3-29F3
> /dev/disk/by-partuuid/8456ded4-2c33-53f2-8465-5c87757d9c0a
> /dev/disk/by-partlabel/EFI\x20Sys\x20Part
>
> Given the above, how should the menuentry
>
> menuentry 'Xen' {
> insmod part_gpt gpt
> insmod diskfilter mdraid1x
> insmod ext2
> insmod search_fs_uuid
> insmod chain
> set root=(hd6,gpt2)
> chainloader /EFI/XEN/xen.efi
> }
>
> be edited so the lines
>
> set root=
> chainloader
>
> correctly
>
> -- use a 'fixed', drive-specific UUID
>
you can use search to set root using UUID as a hint.
> -- use the right case for grub2 chainloading
>
> ?
>
> LT
>
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>
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Ben Hildred
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