Re: GRUB doesn't recognize partitions on El-Torito image during EFI boot from CD

[Jacek Konieczny]

On Thu, 14 Nov 2013 22:07:25 +0400
Andrey Borzenkov <address@hidden> wrote:
> В Tue, 12 Nov 2013 17:19:11 +0100
> Jacek Konieczny <address@hidden> пишет:
> 
> >       FS2: Alias(s):CD20e0a1b:;BLK8:
> >           
> > PciRoot(0x0)/Pci(0x1F,0x2)/Sata(0x4,0x0,0x0)/CDROM(0x1)/HD(1,MBR,0x00000000,0x1,0x855A1)
> 
> > FS2 is the contents of a partition of the El-Torito image on the CD.
> > 
> 
> Yes, grub explicitly skips over such paths.

Any good reason for such behaviour?

> > # building of the ISO image
> > mkisofs -v -J -R -D -A "${VERSION}_H" -V "${VERSION}_H"
> > -no-emul-boot -boot-info-table \ -boot-load-size 4 -b
> > boot/isolinux/isolinux.bin -c boot/isolinux/boot.catalog \
> > -eltorito-alt-boot -hard-disk-boot -e boot/efiboot.img \
> 
> And to be sure - you use this CD to boot by selecting "UEFI CD" (or
> whatever it is called in your case) directly from EFI boot menu?

I switched BIOS settings to 'EFI only' (but with 'EFI first' it works
the same) and during start clicked Enter and F12 to select boot device.
There, I have chosen the CD-ROM drive. No special EFI boot menu entry
for this image (/EFI/BOOT/BOOTX64.EFI is started from the 'efiboot.img').

The same CD can be booted in 'legacy BIOS' mode – the
'boot/isolinux/isolinux.bin' image is used in that case.

Anyway, I am going to try the hybrid ISO-GPT image made with xorriso.

Greets,
        Jacek