Arch Linux

CarterCox

Member

From: Argentina

Registered: 2018-02-24

Posts: 116

[SOLVED]dm-crypt: ERROR: device '/dev/mapper/cryptroot/' not found...

Hi guys,

I just configured an encrypted installation by following https://wiki.archlinux.org/index.php/Dm … _with_LUKS and https://wiki.archlinux.org/index.php/Dm … mkinitcpio.

Here are all the relevant files:

/etc/default/grub
GRUB_DEFAULT=0
GRUB_TIMEOUT=1
GRUB_DISTRIBUTOR="Arch"
GRUB_CMDLINE_LINUX_DEFAULT="quiet cryptdevice=UUID=6501ea67-8072-4272-b112-addecc6dce15:cryptroot root=/dev/mapper/cryptroot"
GRUB_CMDLINE_LINUX=""
[...]

/etc/mkinitcio.conf

HOOKS=(base udev autodetect keyboard keymap modconf block encrypt lvm2 filesystems fsck)
[...]

/etc/fstab

# /dev/mapper/cryptroot
UUID=6501ea67-8072-4272-b112-addecc6dce15       /               ext4            rw,relatime,data=ordered        0 1

# /dev/sda1
UUID=74b46520-292e-463c-87e8-4a10c0ac87f7       /boot           ext4            rw,relatime,data=ordered        0 2

# /dev/sda3
UUID=06b74ddd-b7bc-4fc5-8068-bb415feba5ed       none            swap            defaults,pri=-2 0 0

I generated all the necessary configuration files after editing them (grub and mkinitcpio).

But when I boot this happens:

ERROR: device '/dev/mapper/cryptroot/' not found. Skipping fsck.
mount /new_root: no filesystem type specified.
You are now being dropped into an emergency shell.
sh: can't access tty; job control turned off
[rootfs ]#

What did I do wrong?

Thanks for any help you can provide!

Last edited by CarterCox (2018-06-05 21:56:36)

---

And neither the angels in Heaven above
   Nor the demons down under the sea
Can ever dissever my soul from the soul
   Of the beautiful Annabel Lee;

loqs

Member

Registered: 2014-03-06

Posts: 19,113

Re: [SOLVED]dm-crypt: ERROR: device '/dev/mapper/cryptroot/' not found...

When you are dropped to the rescue shell can you manually open the luks container?

CarterCox

Member

From: Argentina

Registered: 2018-02-24

Posts: 116

Re: [SOLVED]dm-crypt: ERROR: device '/dev/mapper/cryptroot/' not found...

When running

cryptsetup /dev/sda2 cryptroot

I get

WARNING: Locking directory /run/cryptsetup is missing!
Enter passphrase for /dev/sda2:

So I enter the passphrase and it is indeed unencrypted.

---

And neither the angels in Heaven above
   Nor the demons down under the sea
Can ever dissever my soul from the soul
   Of the beautiful Annabel Lee;

loqs

Member

Registered: 2014-03-06

Posts: 19,113

Re: [SOLVED]dm-crypt: ERROR: device '/dev/mapper/cryptroot/' not found...

You have the same UUID for the luks container and its contents.  After you decrypt it and run blkid you should have two seperate UUIDs one for /dev/sda2 and a different one for /dev/mapper/cryptroot.
The UUID GRUB needs for the cryptdevice parameter is  the one for /dev/sda2 the other one could be used in place of root=/dev/mapper/cryptroot.
edit:
spelling one not oen.

Last edited by loqs (2018-06-05 00:04:19)