Windows 安装在 sdb 驱动器上，而 ubuntu 18.04 安装在 sda 上，我正在尝试恢复 grub，因为 Windows 更新删除了 grub 加载程序，这是驱动器状态。
Device Start End Sectors Size Type
/dev/sda1 2048 485375 483328 236M EFI System
/dev/sda2 485376 33298431 32813056 15.7G Linux swap
/dev/sda3 33298432 130955263 97656832 46.6G Linux filesystem
/dev/sda4 130955264 468860927 337905664 161.1G Linux filesystem
Disk /dev/sdb: 238.5 GiB, 256060514304 bytes, 500118192 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 50C485F0-3276-4B2E-9CB9-9A52C64F27DF
Device Start End Sectors Size Type
/dev/sdb1 2048 34815 32768 16M Microsoft reserved
/dev/sdb2 34816 213399551 213364736 101.8G Microsoft basic data
/dev/sdb3 213399552 500117503 286717952 136.7G Microsoft basic data
Disk /dev/sdc: 15.1 GiB, 16231956480 bytes, 31703040 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x0005a5bd
Device Boot Start End Sectors Size Id Type
/dev/sdc1 * 2048 31703039 31700992 15.1G c W95 FAT32 (LBA)
块
/dev/sda1: UUID="ADC3-E91C" TYPE="vfat" PARTUUID="fb9053a7-ae31-4448-9eca-dc8fedf6fee3"
/dev/sda3: UUID="75724aad-9957-44b9-8f94-db27227545c3" TYPE="ext4" PARTUUID="41716fbf-4d56-4cc7-822f-2083cde39263"
/dev/sda4: UUID="ef014f8c-f8cd-4501-8235-75ead0d5f1cf" TYPE="ext4" PARTUUID="11343f93-36a6-4c4a-99ae-62a8a942a970"
/dev/sdb1: LABEL="M2-1" UUID="b900ddbe-fb05-4b4a-b1a7-9df4f0cb8056" TYPE="ext4" PARTLABEL="Microsoft reserved partition" PARTUUID="3680107f-c7af-460e-a339-f60fd3a65bb5"
/dev/sdb2: UUID="92726A85726A6E43" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="b021d210-4d3d-4bb0-b4ca-9b27bddb34ea"
/dev/sdb3: LABEL="Backup" UUID="D2F6-BCC2" TYPE="vfat" PARTUUID="8a34f372-f9d8-4bf0-82e1-722e4dc3c8b9"
/dev/sdc1: LABEL="UBUNTU 18_0" UUID="C840-3295" TYPE="vfat" PARTUUID="0005a5bd-01"
当我运行这些命令时，它会引发错误，不知道现在该怎么办。
ubuntu@ubuntu:~$ sudo mkdir /mnt/ubuntu
ubuntu@ubuntu:~$ sudo mount /dev/sda3 /mnt/ubuntu
ubuntu@ubuntu:~$ sudo grub-install --boot-directory=/mnt/ubuntu/boot /dev/sda
Installing for i386-pc platform.
grub-install: warning: this GPT partition label contains no BIOS Boot Partition; embedding won't be possible.
grub-install: 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..
grub-install: error: will not proceed with blocklists.
BIOS：由于运行正常，因此选择了“启用传统支持并禁用安全启动”选项。