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SpongeBOB

Member

From: Brussels

Registered: 2022-02-07

Posts: 150  

boot on LUKS encrypted drive ( initramfs Vs initrd ) ?

Hi everyone,

I've installed a Devuan rpi version ( 2025-01-10-0317_rpi-4-devuan-daedalus-6.1.93-arm64-ext4.zip ) on my Rapsberry pi 4.

I've recompiled the https://github.com/raspberrypi/linux kernel ( 6.1.93 ) to support some additional cryptographic algorithm.

I'm following the LUKS on Raspberry Pi 2021 guide
That explain step by step how enable LUKS on raspberry pi.

But the guide use initramfs and Devuan rpi seem to use initrd

So the question is: should I migrate to initramfs ? and how check whats is inside my current initrd ?

or keep-up with initrd but then how insert the necessary to enable LUKS drive to be mounted by it ( initrd ) ?

Thanks..

---

Linux noob, plz be kind

SpongeBOB

Member

From: Brussels

Registered: 2022-02-07

Posts: 150  

Re: boot on LUKS encrypted drive ( initramfs Vs initrd ) ?

I've did

root: file /boot/broadcom/initrd.gz
initrd.gz: Zstandard compressed data ....

root: unmkinitramfs /boot/broadcom/initrd.gz Extracted/
# data where extracted to Extracted/
# but I go few error like:
# cpio: cannot link usr/sbin/vconfig to usr/sbin/watchdog: Operation not permitted

So the initrd.gz file is actually an initramfs file it was misleading.

But now I have a problem with mkinitramfs :'(
https://programming.dev/post/23945016

You can reply here , i'll merge both thread

Thanks

---

Linux noob, plz be kind

c0rnelius

Member

Registered: 2020-06-13

Posts: 53  

Re: boot on LUKS encrypted drive ( initramfs Vs initrd ) ?

It is just a script that creates a copy of the initramfs that is generated, so there is a static name for the config.txt to use.

/etc/initramfs/post-update.d/99-initrd