HW and goal: Openwrt 22.03.0 to be upgraded to 22.03.3.
I had the splendid idea of using a 512GB mSATA drive in my APU2 router, resulting in
/dev/sda1 -> boot (16 MB)
/dev/sda2 -> rootfs (1024 MB)
/dev/sda3 -> partition for data (around 510 GB, maybe < 100 GB used till now)
and I use Openwrt Image Builder to generate images including all packages needed.
And in this case in wanted MBR and /dev/sda3 to be untouched, so I could access the data partition after upgrade. So I followed the tutorial here (extract ...boot.img (via VM) and use ...rootfs.img).
The easiest way was to use TinyCore (USB boot) on APU2 and then dd if=boot.img of=/dev/sda1 as well as dd if=rootfs.img of=/dev/sda2.
Result (no success yet)
It boots and hangs after 3.3 seconds
to check I mounted /dev/sda2 -> /mnt/rootfs, and saw there was no /etc/config/network, so I restored the backup for all, config, firewall, and so on, to make sure it has a meaningful setup.
still no luck, hangs always at 3.3 seconds, telling
"clocksource: Switched to clocksource tsc"
Did anyone observe the same behaviour or what do I need to do to be successful ?
I used the combined-ext4 binary and dd it to disk using a live usb (debian) connected to serial port of the APU. I upgraded to the latest coreboot BIOS also from 3mdeb and it worked like a breeze.
I used fdisk to create the last partition, and I did not create it directly after sda2 but with some 10% of the sectors (i have way too much space anyways ) in case a next upgrade is bigger than before.
After that I ran resize2fs /dev/sda2 as stated in the guide.
Then I used opkg update && opkg install commands with all my packages.
The reason I could not use Attended Sysupgrade was that I came from 19.07 and it was not supported until 21.xx I think. It will be very interesting to see if I can upgrade next time without doing a complete full installation.
Is there a reason you did not chose the combined-ext4 image?
Sorry for my late reply. I managed to build two partitions for boot (both work which is really cool) and a data partition.
However, with upgrading I'm still unsuccessful, but I think I'm close. Many thanks for the great hint !