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Re: Performing installer tests on PowerMac with USB sticks


On 4/30/19 10:42 PM, Thomas Schmitt wrote:
> grub-mkrescue produces bootable ISOs. I understand that the ISO gets
> prepared with HFS+ for this platform if a directory
>   /usr/lib/grub/powerpc-ieee1275
> exists with the files from
>   https://packages.debian.org/sid/ppc64el/grub-ieee1275-bin/filelist
> A merely bootable ISO which leads to a GRUB console prompt is produced
> by:
>   mkdir minimal
>   touch minimal/empty-file.txt
>   grub-mkrescue -o output.iso minimal
> output.iso is supposed to contain an Apple Partition Map and a HFS+
> superblock with directory tree. I expect it to be prepared for booting
> from CD, DVD, and USB stick.
> (DVD+RW is about as easy to overwrite as an USB stick. Either with
>  a burn program or with plain dd and sync.)
> If you see a GRUB prompt, then the equipment suffices and the storage
> device works for booting.

This is exactly what I thought I will do next after reading that OpenFirmware
apparently supports HFS+. I have finally brought my iBook G4 home from the
office today and will start experimenting with the bootloader tomorrow.


 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz@debian.org
`. `'   Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913

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