On 2022-05-31 16:18:42 Felix Miata wrote: > J Leslie Turriff composed on 2022-05-31 15:23 (UTC-0500): > > I've been using an EFI (not UEFI) system for years to run OpenSuSE Linux > > (since I have no Windoze on my machine I saw no reason to fool with UEFI, > > which had teething problems when I got my motherboard). Now I'm trying > > to install Ubuntu 20 LTS on a separate drive, but the installer is > > complaining about EFI and boot partitions. I've searched for help, but > > all I get is UEFI stuff. I don't want to reset my BIOS because then I > > wouldn't be able to boot back to my old system if I have problems with > > Ubuntu. > > Is anyone here interested in giving me a helping hand? > > It's possible to have a UEFI on one disk and MBR/Legacy on another, but > you'd have to manually construct required stanzas to enable booting one > type from the other type. That's no problem at if you don't mind booting > from the PC's BBS menu whenever you wish to boot from the other disk. Also, > other can be added to current and vice versa manually by constructing > /boot/grub2/custom.cfg and/or editing one of nn_CUSTOM in /etc/grub.d/. > I've never actually tried booting UEFI Linux from Legacy Grub, but I have > booted Legacy Linux from UEFI Grub. I never spent much time marrying Legacy > with UEFI, because it's so much simpler just to get used to using the BBS > hotkey when needed. > > What could possibly be different about the basics between EFI and UEFI I've > never pondered, other than without U it would be older and thus less well > developed than newer versions. "older" == "mature" :-D > > I have 8 UEFI PCs including 1 Mac. All but the first are booting UEFI. UEFI > is more sophisticated and IMO a vast improvement. Its different, but in > this case different is better. My first that isn't using UEFI was my first > exposure to UEFI, and an upgrade that included moving 3 disks with RAID1 on > 2 of them, so I was only interested in quick success, not learning RAID in > a UEFI context at the same time as learning UEFI. That's basically the way I started; and there was a lot of FUD about most UEFI partition being too small for Linux but nothing much about sizing it right, so I just stuck with EFI. > > IIRC, I have only one out of 30+ working multi- multiboot PCs on which > Ubuntu is installed other than on an only disk. One OS installation per > disk I never do. I have just one PC and one ancient Mac. This is my first time trying multiboot. I can get as far as the partitioning step in Ubuntu install, but I want separate /opt and /usr/local partitions, so I can't just use the default single partition install. The installer says I need > > IMO, your best way forward, subject to any EFI limitations imposed by your > PC, is to install Ubuntu in EFI mode, then at some point in time convert > the openSUSE installation to EFI mode. Leslie -- ____________________________________________________ tde-users mailing list -- users@xxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxx Web mail archive available at https://mail.trinitydesktop.org/mailman3/hyperkitty/list/users@xxxxxxxxxxxxxxxxxx
