Re: changing ext. USB disk to UEFI boot
- Reply: Matthias Apitz : "Re: changing ext. USB disk to UEFI boot"
- In reply to: Matthias Apitz : "Re: changing ext. USB disk to UEFI boot"
- Go to: [ bottom of page ] [ top of archives ] [ this month ]
Date: Wed, 03 Apr 2024 13:28:53 UTC
On Apr 3, 2024, at 4:29 AM, Matthias Apitz <guru@unixarea.de> wrote: > El día miércoles, abril 03, 2024 a las 12:23:57 -0700, Edward Sanford Sutton, III escribió: > >>> How can I modify the partition da0p1 to UEFI without touching the already >>> installed da0p2? Is it enough to carry out the creation of the MS-DOS >>> file system in da0p1 and copy the boot loader /boot/loader.efi to it? >> >> If it was bigger it would have worked. With such a small da0s1, consider >> deleting the swap partition, make a UEFI partition from part of its space, >> then make a swap partition from what remains. You would then have both UEFI >> and legacy booting available while avoiding a reformat. Manpages for >> loader.efi(8) and uefi(8) explain where it can go and what to name it. > > Thanks, this is a nice idea. I never used this swap partition on this > external disk. As I said, it is only for testing a new FreeBSD or > compiled ports tree (with poudriere) before installing it. > > So, I will delete the da0p3 and recreate it as -t efi, perhaps in > smaller size of 40M. The da0p4 is used for backup purpose. > Is it a problem that the efi partition is not the first one, or does > this no matter? FWIW, here is the partition table that got created via a default ZFS-on-root install of a FreeBSD 13 system I use: # gpart show ada0 => 40 1953525088 ada0 GPT (932G) 40 532480 1 efi (260M) 532520 1024 2 freebsd-boot (512K) 533544 984 - free - (492K) 534528 4194304 3 freebsd-swap (2.0G) 4728832 1948794880 4 freebsd-zfs (929G) 1953523712 1416 - free - (708K) Note the default size of 260 MB for the EFI partition. Cheers, Paul.