何らかの理由で、GRUBはハードドライブWDC WD40EJRX-89Aから消えました。おそらくその理由は、SATAドライブ/ケーブルを物理的に変更しているのに、SATAケーブルを同じスロットに接続しているかどうかわからないためです。
ライブCDを使用してGRUBを再インストールしようとしましたが、インストールされていません。
root@debian:~# fdisk -l
Disk /dev/sdc: 232.89 GiB, 250059350016 bytes, 488397168 sectors
Disk model: Samsung SSD 850
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
Device Start End Sectors Size Type
/dev/sdc1 2048 1085439 1083392 529M Windows recovery environment
/dev/sdc2 1085440 1290239 204800 100M EFI System
/dev/sdc3 1290240 1323007 32768 16M Microsoft reserved
/dev/sdc4 1323008 185296895 183973888 87.7G Microsoft basic data
/dev/sdc5 185296896 488394751 303097856 144.5G Microsoft basic data
Disk /dev/sdb: 3.64 TiB, 4000787030016 bytes, 7814037168 sectors
Disk model: WDC WD40EJRX-89A
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Device Start End Sectors Size Type
/dev/sdb1 2048 1050623 1048576 512M EFI System
/dev/sdb2 1050624 4956159 3905536 1.9G Linux filesystem
/dev/sdb3 4956160 5669019647 5664063488 2.6T Linux filesystem
/dev/sdb4 5669019648 5669224447 204800 100M EFI System
/dev/sdb5 5669224448 5669257215 32768 16M Microsoft reserved
/dev/sdb6 5669257216 5882199868 212942653 101.5G Microsoft basic data
/dev/sdb7 5882200064 5883518975 1318912 644M Windows recovery environment
/dev/sdb8 5883521024 5883725823 204800 100M EFI System
/dev/sdb9 5883725824 5883930623 204800 100M EFI System
Disk /dev/sda: 931.51 GiB, 1000204886016 bytes, 1953525168 sectors
Disk model: ST1000VX000-1ES1
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 6053887 6051840 2.9G 83 Linux
/dev/sda2 336230400 1953521663 1617291264 771.2G 7 HPFS/NTFS/exFAT
/dev/sda3 6055934 336230399 330174466 157.4G 5 Extended
/dev/sda5 6055936 336230399 330174464 157.4G 83 Linux
Partition 3 does not start on physical sector boundary.
Partition table entries are not in disk order.
Disk /dev/sdd: 7.5 GiB, 8056209408 bytes, 15734784 sectors
Disk model: Transcend 8GB
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
Device Boot Start End Sectors Size Id Type
/dev/sdd1 * 0 4938303 4938304 2.4G 0 Empty
/dev/sdd2 1496 6721 5226 2.6M ef EFI (FAT-12/16/32)
Disk /dev/loop0: 2.08 GiB, 2237280256 bytes, 4369688 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
root@debian:~# cryptsetup luksOpen /dev/sdb3 home_sdb3
Enter passphrase for /dev/sdb3:
root@debian:~# vgchange -ay
2 logical volume(s) in volume group "User-PC-vg" now active
root@debian:~# vgscan
Found volume group "User-PC-vg" using metadata type lvm2
root@debian:~# vgscan -ay
vgscan: invalid option -- 'a'
Error during parsing of command line.
root@debian:~# vgchange -ay
2 logical volume(s) in volume group "User-PC-vg" now active
root@debian:~# lvscan
ACTIVE '/dev/User-PC-vg/root' [<55.88 GiB] inherit
ACTIVE '/dev/User-PC-vg/home' [2.58 TiB] inherit
root@debian:~# mount /dev/User-PC-vg/root /mnt
root@debian:~# modprobe efivars
modprobe: FATAL: Module efivars not found in directory /lib/modules/5.10.0-10-amd64
root@debian:~# mount /dev/sdb1 /mnt/boot/efi
mount: /mnt/boot/efi: mount point does not exist.
root@debian:~# mount /dev/User-PC-vg/root /mnt
mount: /mnt: /dev/mapper/User--PC--vg-root already mounted on /mnt.
root@debian:~# mount /dev/sdb1 /mnt/boot/efi^C
root@debian:~# umount /mnt
root@debian:~# mkdir /media/linux
root@debian:~# mount /dev/User-PC-vg/root /media/linux/
root@debian:~# modprobe efivars
modprobe: FATAL: Module efivars not found in directory /lib/modules/5.10.0-10-amd64
root@debian:~# mount /dev/sdb1 /media/linux/boot/efi
mount: /media/linux/boot/efi: mount point does not exist.
root@debian:~# mount --bind /dev /media/linux/dev/
root@debian:~# mount --bind /dev/pts /media/linux/dev/pts
root@debian:~# mount --bind /proc /media/linux/proc
root@debian:~# mount --bind /sys /media/linux/sys
root@debian:~# chroot /media/linux
root@debian:/# mount /dev/sdb1 /boot/efi
mount: /boot/efi: mount point does not exist.
root@debian:/# mount /dev/sdb2 /boot
root@debian:~# chroot /media/linux
root@debian:/# mount /dev/sdb1 /boot/efi
root@debian:/# mount /dev/sdb2 /boot
mount: /boot: /dev/sdb2 already mounted on /boot.
root@debian:/etc/apt/sources.list.d# apt-get install --reinstall grub-efi-amd64
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 0 not upgraded.
Need to get 39.8 kB of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 http://deb.debian.org/debian bullseye/main amd64 grub-efi-amd64 amd64 2.04-20 [39.8 kB]
Fetched 39.8 kB in 0s (271 kB/s)
Preconfiguring packages ...
(Reading database ... 169682 files and directories currently installed.)
Preparing to unpack .../grub-efi-amd64_2.04-20_amd64.deb ...
Unpacking grub-efi-amd64 (2.04-20) over (2.04-20) ...
Setting up grub-efi-amd64 (2.04-20) ...
Installing for x86_64-efi platform.
grub-install: warning: EFI variables are not supported on this system..
Installation finished. No error reported.
Generating grub configuration file ...
Found background image: /usr/share/images/desktop-base/desktop-grub.png
Found linux image: /boot/vmlinuz-5.10.0-11-amd64
Found initrd image: /boot/initrd.img-5.10.0-11-amd64
Found linux image: /boot/vmlinuz-5.10.0-10-amd64
Found initrd image: /boot/initrd.img-5.10.0-10-amd64
grub-probe: error: cannot find a GRUB drive for /dev/sdd1. Check your device.map.
done
Processing triggers for shim-signed:amd64 (1.38+15.4-7) ...
root@debian:/etc/apt/sources.list.d# apt-get install --reinstall grub-efi
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following NEW packages will be installed:
grub-efi
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 2,536 B of archives.
After this operation, 16.4 kB of additional disk space will be used.
Get:1 http://deb.debian.org/debian bullseye/main amd64 grub-efi amd64 2.04-20 [2,536 B]
Fetched 2,536 B in 0s (13.6 kB/s)
Selecting previously unselected package grub-efi.
(Reading database ... 169682 files and directories currently installed.)
Preparing to unpack .../grub-efi_2.04-20_amd64.deb ...
Unpacking grub-efi (2.04-20) ...
Setting up grub-efi (2.04-20) ...
root@debian:/etc/apt/sources.list.d# update-grub
Generating grub configuration file ...
Found background image: /usr/share/images/desktop-base/desktop-grub.png
Found linux image: /boot/vmlinuz-5.10.0-11-amd64
Found initrd image: /boot/initrd.img-5.10.0-11-amd64
Found linux image: /boot/vmlinuz-5.10.0-10-amd64
Found initrd image: /boot/initrd.img-5.10.0-10-amd64
grub-probe: error: cannot find a GRUB drive for /dev/sdd1. Check your device.map.
done
root@debian:/etc/apt/sources.list.d# cat /boot/grub/device.map
cat: /boot/grub/device.map: No such file or directory
root@debian:/etc/apt/sources.list.d# grub-mkdevicemap
root@debian:/etc/apt/sources.list.d# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 2.1G 1 loop
sda 8:0 0 931.5G 0 disk
├─sda1 8:1 0 2.9G 0 part
├─sda2 8:2 0 771.2G 0 part
├─sda3 8:3 0 1K 0 part
└─sda5 8:5 0 157.4G 0 part
sdb 8:16 0 3.6T 0 disk
├─sdb1 8:17 0 512M 0 part /boot/efi
├─sdb2 8:18 0 1.9G 0 part /boot
├─sdb3 8:19 0 2.6T 0 part
│ └─home_sdb3 253:0 0 2.6T 0 crypt
│ ├─User--PC--vg-root 253:1 0 55.9G 0 lvm /
│ └─User--PC--vg-home 253:2 0 2.6T 0 lvm
├─sdb4 8:20 0 100M 0 part
├─sdb5 8:21 0 16M 0 part
├─sdb6 8:22 0 101.5G 0 part
├─sdb7 8:23 0 644M 0 part
├─sdb8 8:24 0 100M 0 part
└─sdb9 8:25 0 100M 0 part
sdc 8:32 0 232.9G 0 disk
├─sdc1 8:33 0 529M 0 part
├─sdc2 8:34 0 100M 0 part
├─sdc3 8:35 0 16M 0 part
├─sdc4 8:36 0 87.7G 0 part
└─sdc5 8:37 0 144.5G 0 part
sdd 8:48 1 7.5G 0 disk
├─sdd1 8:49 1 2.4G 0 part
└─sdd2 8:50 1 2.6M 0 part
root@debian:/etc/apt/sources.list.d# grub-install /dev/sdb
Installing for x86_64-efi platform.
grub-install: warning: EFI variables are not supported on this system..
Installation finished. No error reported.
root@debian:/etc/apt/sources.list.d# cat /boot/grub/device.map
(hd0) /dev/disk/by-id/lvm-pv-uuid-kgnDO4-VKw7-Vw8c-71N3-ez6U-GoGj-T9lueq
(hd1) /dev/disk/by-id/ata-ST1000VX000-1ES162_Z4YE5K37
(hd2) /dev/disk/by-id/ata-WDC_WD40EJRX-89AKWY0_WD-WX32D21CZ08S
(hd3) /dev/disk/by-id/ata-Samsung_SSD_850_EVO_250GB_S2R6NB0H926126V
(hd4) /dev/disk/by-id/usb-JetFlash_Transcend_8GB_64E2V0LU-0:0
答え1
/syschrootをバインドマウントするときに--rbind代わりに使用してください--bind。
mount --rbind /sys /media/linux/sys
または、chrootの後にefivarfs仮想ファイルシステムを手動でマウントします。/sys/firmware/efi/efivars
mount -t efivarfs none /sys/firmware/efi/efivars
grub-installこのファイルシステムは、EFIブート変数を操作するために必要です。mount --rbind元のすべてのサブマウントが含まれていますが、通常は--bindこれを無視します。
efivarfsファイルシステムが利用できない場合は、ライブメディアが起動していることを確認してください。UEFIモードで。レガシーBIOSモードで誤ってライブメディアを起動した場合、EFI起動変数を操作するために使用されるファームウェアAPI（efivarfs）は使用できません。
答え2
私のためにbootとefiフラグを使って別のfat32 512MBパーティションを作成し、Linuxを再インストールしました。