booting DragonflyBSD Unix?

[dchmelik]

I installed DragonFlyBSD Unix (people were saying has more efficient/fast SMP than FreeBSD Unix) and tried to configure GRUB2 (from Slackware64 15+-current GNU/Linux) to boot it, but can't get it to boot any way, even from it's installer.
        This is in /etc/grub/d/40_custom.

menuentry "DragonFlyBSD Unix" --class dragonflybsd --class bsd --class os {
  set root=(hd0,msdos3)
  kfreebsd /boot/loader
}

        A similar menu currently works for both NetBSD Unix & FreeBSD. I also tried 'kfreebsd /kernel/kernel' in there.
        That won't boot, and DragonFlyBSD's own boot-loader (on installer) won't either: apparently isn't fully-documented (I dropped to command line, tried 'lsdev' (found correct slice,) 'set currdev=disk4s3a,' 'boot /kernel/kernel.')

[Head_on_a_Stick]

Have you tried using this line instead of "kfreebsd /boot/loader":

chainloader +1

[J65nko]

Have you seen the last answer of May 2020 in https://unix.stackexchange.com/quest...-on-a-mbr-disk ?

[dchmelik]

I tried installing on UFS, reinstalling on HAMMER2, and tried each of these nine options (I saw the link above.)
        I tried booting GRUB2 w/modules for ufs2, part_dfly, part_msdos, chainloading (can't read any filesystem even when all those modules are loaded, except can read NetBSD Unix & FreeBSD Unix UFS.)
        I tried booting from the DragonFlyBSD installer USB flash drive, both fs, and on a case port and back/onboard port (loads root kernel, crashes, asks for manual filesystem specification, keyboard freezes.)
        I tried booting from the DragonFlyBSD installer DVD, both fs (loads root kernel, crashes, asks for manual filesystem specification, keyboard freezes.)

[aht0]

Install on separate drive and boot that drive by whatever hotkey your pc bios has for the purpose.

DragonFly's UFS Implementation aint quite same as FreeBSD's
GRUB wont recognize Hammer1/2 anyway.

You might have luck with rEFInd loader tho

[dchmelik]

I was able to boot earlier versions (with instructions from IRC) manually specifying partition from DVD (not USB) and finally with DragonFLyBSD 6.4.0 can finally boot from GRUB2.