What is the Fedora 34 RAW Image. Part Two

Last article I discussed the Fedora RAW file image and the first partition it contains. Now let us look at the second and third partitions.

This is at offset 1230848. After unmounting the boot partition, we can mount this one:

sudo mount -o loop,offset=630194176 /home/ayoung/Downloads/Fedora-Workstation-34-1.2.aarch64.raw /mnt/disk1/
$ ls /mnt/disk1/
config-5.11.12-300.fc34.aarch64  dtb-5.11.12-300.fc34.aarch64  grub2                                   loader      System.map-5.11.12-300.fc34.aarch64
dtb                              efi                           initramfs-5.11.12-300.fc34.aarch64.img  lost+found  vmlinuz-5.11.12-300.fc34.aarch64

Here is our missing Linux kernel file, as well as the other stuff you would expect to see in a /boot partition on a Linux box.

In addition, the subdirectory dtb-5.11.12-300.fc34.aarch64/ has a bunch more device tree files.

file /mnt/disk1/dtb-5.11.12-300.fc34.aarch64/qcom/sdm845-mtp.dtb
/mnt/disk1/dtb-5.11.12-300.fc34.aarch64/qcom/sdm845-mtp.dtb: Device Tree Blob version 17, size=91017, boot CPU=0, string block size=3521, DT structure block size=87440

With yet a third extension.

Unount that partition so we can mount the third. The offset for that comes out to be 1703936000 .

$ sudo mount -o loop,offset=1703936000 /home/ayoung/Downloads/Fedora-Workstation-34-1.2.aarch64.raw /mnt/disk2
[ayoung@ayoungP40 ~]$ ls /mnt/disk2/
home  root
[ayoung@ayoungP40 ~]$ ls /mnt/disk2/root/
bin  boot  dev  etc  home  lib  lib64  media  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var
[ayoung@ayoungP40 ~]$ ls /mnt/disk2/home/
[ayoung@ayoungP40 ~]$

Sop we have a root file system, as well as the stub of a Home directory. There is a lot of stuff in here:

ls /mnt/disk2/root/usr/bin/ | wc -l

There should be a rpm database.

[ayoung@ayoungP40 ~]$ ls /mnt/disk2/root/var/lib/rpm/
rpmdb.sqlite  rpmdb.sqlite-shm  rpmdb.sqlite-wal
$ rpm  --root /mnt/disk2/root/   -qa | wc -l

So that is our root file system.

2 thoughts on “What is the Fedora 34 RAW Image. Part Two

  1. it was a good article to provide insights about the way contents are organised. I guess, currently, rasPi installers (unlike anaconda) dont support partitioning during the install. so if I were to have two OSes on the same device, I may have to partition first and then decompress XZ on different partitions .
    also to use grub, which traditionally has been a familiar bootloader for most of the linux users, what is the best way to organise the partitions on the device ? and then modify /boot/grub config files.

  2. I’ve got an article in the works on using osbuild to create the image. It is not something I know from first principles, but it should answer your question.

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