On 2/25/25 2:42 PM, Steve Underwood wrote:
I thought I'd post a follow up about this, after doing more installs.
I agree that the time of the MBR should have passed for any hardware
that is not ancient. I thought that Fedora 41 and Debian 12 were putting
an MBR on the disc, because they had decided the old machines I was
using could not handle a GPT disc, and UEFI boot. However, it appears
both these installers will put an MBR on any disc of 2TB or less, even
on the most modern machines, unless you force them not to with command
line parameters as you boot the installer. Without forcing they use an
MBR, but they don't set the boot flag. Maybe the testers use larger
discs, and have not noticed this, although I would have expected a lot
of testing to be done with SSDs these days, and anything over 2TB is
still quite pricey. An interesting problem for two independent
installation systems to have.
There was a change back in F37 to use GPT for all x86_64 installs
regardless of whether it was UEFI or legacy (CSM) boot. Maybe your hard
drive already had an MBR partition table and you didn't tell the
installer to reformat.
https://fedoraproject.org/wiki/Changes/GPTforBIOSbyDefault
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