Arch Linux

docinla

Member

Registered: 2019-03-09

Posts: 3

[SOLVED] Can't boot full disk encrypted LVM after install

When I try to boot my "full disc" (not actually using an encrypted boot partition) encryption LVM scheme after install it gets to:
"A start job is running for /dev/ArchDisc/root" and then times out with the following error:

[TIME] Timed out waiting for device /dev/ArchDisc/root
[DEPEND] Dependency failed for Initrd Root Device

then several more dependency failes and it starts the emergency shell

I followed the install guide steps to "Partition the Disks" for UEFI install. At that point I went to the dm-crypt/Encrypting an Entire disk guide using LVM on LUKS. I set up a partition scheme whereby

/dev/sda1

is a 512MiB FAT32 partition mounted to

/boot

for the EFI. I then have 2 partitions in the cryptlvm drive

/dev/sda2

, root (110GiB) and swap (8GiB).
I used the following hooks

HOOKS=(base systemd autodetect keyboard sd-vconsole modconf block sd-encrypt sd-lvm2 filesystems fsck)

it doesn't have udev per the wiki example. Is this needed?
I also added to the EFI entry config for arch under options

rd.luks.name=/dev/sda2_crypto_LUKS_UUID_number_here=cryptlvm root=/dev/ArchDisc/root

I named the lvm group ArchDisc

it doesn't prompt me for the password at any point to unlock the encryption. Once back using the install disc, I can unlock the drive with

cryptsetup open /dev/sda2 cryptlvm

where it asks me for the password and read the files.

I'm a bit stumped. I appreciate any advice where to look next!

Last edited by docinla (2019-03-09 06:43:29)

docinla

Member

Registered: 2019-03-09

Posts: 3

Re: [SOLVED] Can't boot full disk encrypted LVM after install

Argh. I figured it out!
In the instructions it says to use:

cryptdevice=UUID=device-UUID:cryptlvm root=/dev/MyVolGroup/root

If using the sd-encrypt hook, the following need to be set instead:

rd.luks.name=device-UUID=cryptlvm root=/dev/MyVolGroup/root

I stupidly used a colon in the second instead of an = sign after the device-UUID. Changing it from a colon to an equals made it magically work. Anyways, now onto everything else! I'm sure I'll be back soon...

Last edited by docinla (2019-03-09 06:42:05)