Tom Hughes via devel <devel@xxxxxxxxxxxxxxxxxxxxxxx> writes: > On 05/04/2022 15:52, Ben Cotton wrote: > >> * There is no migration story from Legacy BIOS to UEFI - >> repartitioning effectively mandates a reinstall. As a result, we >> don’t drop support for existing Legacy BIOS systems yet, just new >> installations. > > This is where I have a problem with this, the fact that there is > no upgrade path - virtually my entire installed base of Fedora is > running legacy BIOS and not being able to upgrade them will be > something of a headache. Yup. That's why there's a deprecation window here. > Is it actually true though? You need to be able to find some space > for an EFI partition but assuming that can be done is there some > other reason you can't migrate from BIOS to UEFI booting? Right, you need the EFI partition (EFI System Partition, or ESP). I don't remember what we default those to these days - I usually make about 600M, but I need it larger for testing stuff. The partition scheme also needs to be GPT, not MBR. Once that's all set, the EFI grub2 packages need to be installed, but that's the easy part :) Repartitioning in the general case is very involved. If the system is using an encrypted LVM, that's two more layers to worry about. The dm-crypt area would need to shrink, which means the LVM needs to shrink, which means the filesystems on it need to shrink (and importantly, not all of them can). That doesn't even touch dual-boot scenarios, where our filesysem support is less good than for Linux native cases. To restate that: I think very determined, patient users can make it work in some cases. But I don't think we can expect that to work for everyone, especially without friendly tooling to accomplish it. Be well, --Robbie
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