我有一个 Ubuntu Server 22.04 安装，它从使用 Ventoy 启动的 VDI 映像运行，我正在尝试apt-get upgrade。
当重新安装 GRUB 时，我收到以下消息：
The GRUB boot loader was previously installed to a disk that
is no longer present, or whose unique identifier has changed
for some reason. It is important to make sure that the
installed GRUB core image stays in sync with GRUB modules and
grub.cfg. Please check again to make sure that GRUB is
written to the appropriate boot devices.
1. /dev/sda2 (33 MB; ) on 32017 MB TS32GSSD420K
2. none of the above
(Enter the items or ranges you want to select, separated by
spaces.)
GRUB install devices:
/dev/sda2是 Ventoy 的 EFI 分区，而不是 VDI 内部的分区。尝试以/dev/mapper/ventoy设备身份进入会导致同样的提示，因此我完成了升级而没有重新安装 GRUB，现在正在尝试修复它。
我照做了sudo grub-mkdevicemap，它给了我一个/boot/grub/device.map物理磁盘，如下所示：
(hd0) /dev/disk/by-id/ata-TS32GSSD420K_D964580002
(hd1) /dev/disk/by-id/ata-WDC_WD10EZEX-22MFCA0_WD-WCC6Y5ZE6VAL
(hd2) /dev/disk/by-id/ata-WDC_WD10EZEX-60WN4A0_WD-WCC6Y1VULY52
(hd3) /dev/disk/by-id/ata-Samsung_SSD_860_QVO_4TB_S4CXNF0M423112D
将内容更改为
(hd0) /dev/mapper/ventoy
导致其中一个分区出现错误（ ），并且参考输出（即 /boot）/dev/mapper/ventoy1中的先前错误也出现相同的错误。sudo apt-get upgrade/dev/mapper/ventoy2
ansel@enya:~$ sudo grub-install /dev/mapper/ventoy
Installing for x86_64-efi platform.
grub-install: error: cannot find a GRUB drive for /dev/mapper/ventoy1. Check your device.map.
ansel@enya:~$
相关fdisk -l输出如下：
Disk /dev/sda: 29.82 GiB, 32017047552 bytes, 62533296 sectors
Disk model: TS32GSSD420K
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: D0FA3E5E-2C2A-5658-FABE-84A0C9AE6291
Device Start End Sectors Size Type
/dev/sda1 2048 62467719 62465672 29.8G Linux filesystem
/dev/sda2 62467720 62533255 65536 32M EFI System
Disk /dev/mapper/ventoy: 16 GiB, 17179869184 bytes, 33554432 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: 2820B8E5-E365-41C4-94D9-B1DC8E03B3F2
Device Start End Sectors Size Type
/dev/mapper/ventoy1 2048 1103871 1101824 538M EFI Syste
/dev/mapper/ventoy2 1103872 4773887 3670016 1.8G Linux fil
/dev/mapper/ventoy3 4773888 33552383 28778496 13.7G Linux fil
Disk /dev/mapper/ventoy1: 538 MiB, 564133888 bytes, 1101824 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: 0x00000000
Disk /dev/mapper/ventoy2: 1.75 GiB, 1879048192 bytes, 3670016 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
Disk /dev/mapper/ventoy3: 13.72 GiB, 14734589952 bytes, 28778496 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
将各个分区的行添加到 /boot/grub/device.map 会导致 GRUB 说这些行无效并被忽略：
ansel@enya:~$ cat /boot/grub/device.map
(hd0) /dev/mapper/ventoy
(hd0,1) /dev/mapper/ventoy1
(hd0,2) /dev/mapper/ventoy2
(hd0,3) /dev/mapper/ventoy3
ansel@enya:~$ sudo grub-install /dev/mapper/ventoy
Installing for x86_64-efi platform.
grub-install: warning: the device.map entry `hd0,1' is invalid. Ignoring it. Please correct or delete your device.map.
grub-install: warning: the device.map entry `hd0,2' is invalid. Ignoring it. Please correct or delete your device.map.
grub-install: warning: the device.map entry `hd0,3' is invalid. Ignoring it. Please correct or delete your device.map.
grub-install: error: cannot find a GRUB drive for /dev/mapper/ventoy1. Check your device.map.
ansel@enya:~$
我怎样才能让 GRUB 识别各个分区？
谢谢。