On Sat, Apr 5, 2025 at 6:02 AM hlyg <hlyg2023@outlook.com> wrote: > > i press F12 during Dell boot, a list of options show > > under section "UEFI BOOT:" there are 2 items: FreeBSD and debian > > but all 3 disks installed use mbr, no wonder they don't work > > most probably they are resulted from previous installation on gpt disks > > how to remove them? Use efibootmgr. Gentoo has a nice page on using it. Jeff