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From: mm0fmf <none@invalid.com>
Newsgroups: comp.sys.raspberry-pi
Subject: update-initramfs and no space left on device.
Date: Thu, 11 Jul 2024 18:37:47 +0100
Organization: A noiseless patient Spider
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Ah the joy of patch-Tuesday. Or patch-Thursday in my case. So assorted 
Windows machines updated I thought I'd better check some Linux machines. 
The other week a colleague texted me and pointed out a nasty SSH 
regression being exploited. So I sat in Lyon Airport waiting for the 
gate to be announced and updated my Pi ZeroW gateway and some VMs. I 
just did the SSH updates. It's cool being able to control your machines 
from a distance but using the laptop and a phone with roaming data is 
asking for something to take you offline when you don't want. Today was 
time to catch up with other updates....

All was fine apart from the Pi Zero W which gave an error when running 
update-initramfs claiming there was no space on the device when doing

"update-initramfs: Generating /boot/initrd.img-6.6.31+rpt-rpi-v7l"

There was plenty of space on the device so I tried again. No luck. 
Various ideas tried but it failed at the same place every time. I pulled 
out another SDcard, wrote the image to it, put in the Pi, booted and 
then did an update and upgrade. It failed again at the same place. So it 
wasn't the SDcard that was misbehaving. I flailed about miserably 
wondering what it was till I found this webpage.

https://hillenius.net/post/nospaceleft/

I followed that and sure enough, it fixed everything. What I don't yet 
understand is what I had done to get to this place. And if it's just 
started for me, are other people going to find themselves in the same 
situation real soon now?

I run '2024-03-15-raspios-bookworm-armhf-lite.img' with a few tweaks to 
place logs etc. on the ram disk and I've been running apt update etc. on 
that since end of May. Whatever, after today's update it was not going 
to work unless I followed those changes to initramfs-tools.

Hopefully this may help the next Pi user who gets bitten by this.