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bb078pjzqk2m
n00b
Joined: 10 Jan 2024
Posts: 3
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 Posted: Wed Jan 10, 2024 1:47 am Post subject: Grub does not find the disk |
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Hello, this is my first time installing Linux manually - Gentoo with LUKS and OpenRC. I'm a bit confused how to install it properly, because in the handbook I didn't find the correct GRUB configuration with LUKS. I am using Genkernel in generating initramfs with --luks. I dont use LVM
blkid output in chroot
| Code: | /dev/nvme0n1p1: UUID="6D53-47C8" BLOCK_SIZE="512" TYPE="vfat" PARTUUID="a1aa3a27-aaba-db45-9b35-3c5ba01ebaab"
/dev/nvme0n1p2: UUID="a10b9866-346d-40ed-b225-f3c63dab0e07" TYPE="crypto_LUKS" PARTUUID="9c3a6be4-4bde-224e-b812-2ad7dcb39e50"
/dev/mapper/encrypted: LABEL="rootfs" UUID="20bdbc5b-36b8-4727-87f8-4734d2c414ec" BLOCK_SIZE="4096" TYPE="ext4" |
lsblk output in chroot
| Code: | nvme0n1 259:0 0 931.5G 0 disk
├─nvme0n1p1 259:2 0 512M 0 part /efi
└─nvme0n1p2 259:3 0 931G 0 part
└─root 253:0 0 931G 0 crypt / |
/etc/default/grub
| Code: | GRUB_DISTRIBUTOR="Gentoo"
GRUB_CMDLINE_LINUX="crypt_root=UUID=a10b9866-346d-40ed-b225-f3c63dab0e07:root root=/dev/mapper/root rootfstype=ext4"
GRUB_DISABLE_LINUX_PARTUUID=false |
/etc/fstab
| Code: |
UUID="6D53-47C8" /efi vfat defaults 0 2
UUID="20bdbc5b-36b8-4727-87f8-4734d2c414ec" / ext4 defaults,noatime 0 1 |
Grub output with error
| Code: | Welcome to GRUB!
error: no such device: 20bdbc5b-36b8-4727-87f8-4734d2c414ec.
error: unknown filesystem.
Entering rescue mode... |
Please help me with this problem. I think the problem is in wrong grub configuration |
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grknight
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Joined: 20 Feb 2015
Posts: 1695
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| Posted: Wed Jan 10, 2024 2:11 am Post subject: |
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Being genkernel, the crypt_root bit is incorrect, it should be:
| Code: | | GRUB_CMDLINE_LINUX="crypt_root=UUID=a10b9866-346d-40ed-b225-f3c63dab0e07 root=/dev/mapper/root rootfstype=ext4" |
Also, since /boot is encrypted, GRUB will need device-mapper USE enabled so it can access its modules and configuration. This should prompt for unlocking the device twice as well. |
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bb078pjzqk2m
n00b
Joined: 10 Jan 2024
Posts: 3
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| Posted: Wed Jan 10, 2024 3:03 am Post subject: |
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| grknight wrote: | Being genkernel, the crypt_root bit is incorrect, it should be:
| Code: | | GRUB_CMDLINE_LINUX="crypt_root=UUID=a10b9866-346d-40ed-b225-f3c63dab0e07 root=/dev/mapper/root rootfstype=ext4" |
Also, since /boot is encrypted, GRUB will need device-mapper USE enabled so it can access its modules and configuration. This should prompt for unlocking the device twice as well. |
Thanks, but that didn't solve the problem |
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sMueggli
Guru
Joined: 03 Sep 2022
Posts: 376
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| Posted: Wed Jan 10, 2024 9:29 am Post subject: |
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You are missing
| Code: | | GRUB_ENABLE_CRYPTODISK=y |
in your /etc/default/grub. Then recreate the grub.cfg. |
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bb078pjzqk2m
n00b
Joined: 10 Jan 2024
Posts: 3
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| Posted: Wed Jan 10, 2024 1:42 pm Post subject: |
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| sMueggli wrote: | You are missing
| Code: | | GRUB_ENABLE_CRYPTODISK=y |
in your /etc/default/grub. Then recreate the grub.cfg. |
I found the cause of the problem - I was using LUKS2 and GRUB 2.06. I converted the keys from argon2i to pbkdf2 and installed GRUB 2.12. But also why I need to enter the password 2 times. What could this be related to? |
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grknight
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Joined: 20 Feb 2015
Posts: 1695
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| Posted: Wed Jan 10, 2024 1:53 pm Post subject: |
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| bb078pjzqk2m wrote: | | But also why I need to enter the password 2 times |
You need to enter it once for GRUB so it can find its configuration and the kernel (since /boot is encrypted).
The kernel does not receive anything from GRUB beyond a simple text string.
The kernel then must unlock the device for it to use and all programs started under the kernel. |
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figueroa
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Joined: 14 Aug 2005
Posts: 2965
Location: Edge of marsh USA
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| Posted: Thu Jan 11, 2024 5:28 am Post subject: |
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Don't put quote marks around the UUID in /etc/fstab.
_________________
Andy Figueroa
hp pavilion hpe h8-1260t/2AB5; spinning rust x3
i7-2600 @ 3.40GHz; 16 gb; Radeon HD 7570
amd64/23.0/split-usr/desktop (stable), OpenRC, -systemd -pulseaudio -uefi |
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sMueggli
Guru
Joined: 03 Sep 2022
Posts: 376
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| Posted: Thu Jan 11, 2024 10:31 am Post subject: |
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| figueroa wrote: | | Don't put quote marks around the UUID in /etc/fstab. |
Why not? Do you have any link?
And the man page (man 5 fstab) contains examples with double quotes:
| Quote: | | (e.g UUID="A40D-85E7" or UUID="61DB7756DB7779B3") |
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figueroa
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Joined: 14 Aug 2005
Posts: 2965
Location: Edge of marsh USA
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| Posted: Thu Jan 11, 2024 5:40 pm Post subject: |
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| sMueggli wrote: | | figueroa wrote: | | Don't put quote marks around the UUID in /etc/fstab. |
Why not? Do you have any link?
And the man page (man 5 fstab) contains examples with double quotes:
| Quote: | | (e.g UUID="A40D-85E7" or UUID="61DB7756DB7779B3") |
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The entire reference for your example is for using UUID in the mount command:
| Code: | Note that mount(8) uses UUIDs as strings. The string representation of
the UUID should be based on lower case characters. But when specifying
the volume ID of FAT or NTFS file systems upper case characters are
used (e.g UUID="A40D-85E7" or UUID="61DB7756DB7779B3"). |
However, I just did a little experiment, and in back-to-back tests, I discern that quotes around the UUID don't appear to matter for mount or in fstab. Therefore, sorry for the red herring.
_________________
Andy Figueroa
hp pavilion hpe h8-1260t/2AB5; spinning rust x3
i7-2600 @ 3.40GHz; 16 gb; Radeon HD 7570
amd64/23.0/split-usr/desktop (stable), OpenRC, -systemd -pulseaudio -uefi |
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grknight
Retired Dev
Joined: 20 Feb 2015
Posts: 1695
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| Posted: Thu Jan 11, 2024 5:49 pm Post subject: |
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| figueroa wrote: | | However, I just did a little experiment, and in back-to-back tests, I discern that quotes around the UUID don't appear to matter for mount or in fstab. Therefore, sorry for the red herring. |
Just as a note, please don't do this for a kernel command-line option when passed to genkernel as it cannot parse quotes correctly. |
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Installing Gentoo
