> Here is a some information from the gdisk listing: > > Nbr Size Code Name > -----+------------+------+------------------------- > 1 1000.0 MiB 2700 > 2 260.0 MiB EF00 EFI system partition > 3 128.0 MiB 0C01 Microsoft reserved part > 4 49.6 GiB 0700 Basic data partition > 5 9.7 GiB 2700 Lenovo (?recovery?) > 6 10.0 GiB 8200 Linux SWAP > 7 49.4 GiB 8300 Archlinux / > 8 58.8 GiB 8300 /home > 9 1024.0 KiB EF02 "bios_grub" (Ubuntu?) > 10 59.8 GiB 8300 UBUNTU / > You do not need a bios_grub partition. That is for systems with a BIOS (rather than UEFI) that want use a GPT partition table rather than MBR. You are using UEFI, therefore you are probably using GPT already and so a bios_grub partition is completely unnecessary.