O Grub2 não instala em um disco rígido com o rótulo de partição GPT (sem -force), reclamando de uma partição de inicialização ausente do BIOS - mesmo que haja uma.
A primeira partição (1 MB) deve ser usada como partição de inicialização do BIOS.
grub2-install --boot-directory=BOOT/grub2 /dev/sda
/usr/sbin/grub2-bios-setup: warning: this GPT partition label contains no BIOS Boot Partition; embedding won't be possible.
/usr/sbin/grub2-bios-setup: warning: Embedding is not possible. GRUB can only be installed in this setup by using blocklists. However, blocklists are UNRELIABLE and their use is discouraged..
/usr/sbin/grub2-bios-setup: error: will not proceed with blocklists.
parted /dev/sda unit B print
Model: VMware, VMware Virtual S (scsi)
Disk /dev/sda: 53687091200B
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: pmbr_boot
Number Start End Size File system Name Flags
1 1048576B 2097151B 1048576B
2 2097152B 526385151B 524288000B ext2
3 526385152B 27369930751B 26843545600B ext4
4 27369930752B 32738639871B 5368709120B linux-swap(v1)
5 32738639872B 53686042623B 20947402752B ext4
sgdisk -p /dev/sda
Disk /dev/sda: 104857600 sectors, 50.0 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): F4679BF9-DC8C-4346-8889-83B84F43BE58
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 104857566
Partitions will be aligned on 2048-sector boundaries
Total free space is 4029 sectors (2.0 MiB)
Number Start (sector) End (sector) Size Code Name
1 2048 4095 1024.0 KiB 0700
2 4096 1028095 500.0 MiB 0700
3 1028096 53456895 25.0 GiB 0700
4 53456896 63942655 5.0 GiB 0700
5 63942656 104855551 19.5 GiB 0700
sgdisk -i 1 /dev/sda
Partition GUID code: EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 (Microsoft basic data)
Partition unique GUID: 075D0E05-FC7B-482C-9BF8-0FD0A83D02F5
First sector: 2048 (at 1024.0 KiB)
Last sector: 4095 (at 2.0 MiB)
Partition size: 2048 sectors (1024.0 KiB)
Attribute flags: 0000000000000000
Partition name: ''
sgdisk -i 2 /dev/sda
Partition GUID code: EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 (Microsoft basic data)
Partition unique GUID: 51756103-CDA5-4D09-BFB4-B1DB8A89CE08
First sector: 4096 (at 2.0 MiB)
Last sector: 1028095 (at 502.0 MiB)
Partition size: 1024000 sectors (500.0 MiB)
Attribute flags: 0000000000000000
Partition name: ''
sgdisk -i 3 /dev/sda
Partition GUID code: EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 (Microsoft basic data)
Partition unique GUID: 2A6E6859-DCE0-4040-8683-15B51A3F0911
First sector: 1028096 (at 502.0 MiB)
Last sector: 53456895 (at 25.5 GiB)
Partition size: 52428800 sectors (25.0 GiB)
Attribute flags: 0000000000000000
Partition name: ''
sgdisk -i 4 /dev/sda
Partition GUID code: EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 (Microsoft basic data)
Partition unique GUID: 0CBCDEFE-9467-4534-9EE2-7C142CCD3B09
First sector: 53456896 (at 25.5 GiB)
Last sector: 63942655 (at 30.5 GiB)
Partition size: 10485760 sectors (5.0 GiB)
Attribute flags: 0000000000000000
Partition name: ''
sgdisk -i 5 /dev/sda
Partition GUID code: EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 (Microsoft basic data)
Partition unique GUID: 22C44A3F-B738-4050-8AD5-0556750A074B
First sector: 63942656 (at 30.5 GiB)
Last sector: 104855551 (at 50.0 GiB)
Partition size: 40912896 sectors (19.5 GiB)
Attribute flags: 0000000000000000
Partition name: ''