On Tue, 2 Nov 2021 20:19:10 +0100
"Petr Menšík" <pemensik(a)redhat.com> wrote:
I would like to have my flash drive prepared with recent Live image.
I
know how to write image to an usb drive and how to boot it.
However, I carry 64GB large disk on my keys and I would like to have
two things:
- bootable live image
- data partition for common files, visible from Windows
- should boot both on recent computer with UEFI preference
- should boot also on older computer with legacy boot only.
The program livecd-iso-to-disk from the package livecd-iso-to-mediums
can do the first three parts. Then with a bit of care one can hack in
BIOS boot support. I am not aware of an automatic tool, but basically
one creates a hybrid partition table and manually installs the BIOS
bootloader without disturbing the EFI one. It has been several years
since I did this, and I have forgotten the details. A web search
should help.
Maybe a second run of livecd-iso-to-disk can do it if you do not
reformat the second time.
I understand my expectations are not very low. But because the image
itself can boot on both architectures, I would hope there exist tools
able to prepare such configuration.
I do not know of a canned solution.
Unfortunately, gdisk can display partition tables on image only
partially. It is not able to modify it and add another data partition
after image ends. Which were the only required step after dd
if=Fedora-Workstation-Live-x86_64-35-1.2.iso of=/dev/sdc as I naively
thought.
Do you know if is even theoretically possible? Are there existing
tools able to create both GPT and MBR tables, just like on Fedora
images? How are those images created?
It is theoretically possible and most likely also practically
possible.
I think the Fedora images are created by livemedia-creator.
Jim