The build using the ubuntu-server-pc-arm64.yaml image definition does
not use the snap version of the gadget. I do not know if it was a typo,
but just to make sure: when you provide a gadget url to ubuntu-image,
the tool clone the repo, then call `make install` (with ARCH and SERIES
if necessary) in the directory to build boot assets. We do not rely on
the snap format of the gadget.
The gadget is also important because the resulting volumes and
structures listed in it will define the partitions we create. If we do
not find a structure with the system-data role, we add one to make sure
there is a partitions holding the rootfs. AFAICS this is the case in
your situation since the gadget.yaml only contains one "EFI system"
structure.
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https://bugs.launchpad.net/bugs/2064322
Title:
Invalid backup GPT header on tegra igx image
Status in Ubuntu Image:
Confirmed
Bug description:
Affects Tegra images daily builds and release image:
https://cdimage.ubuntu.com/nvidia-tegra/ubuntu-server/jammy/daily-preinstalled/current/
https://cdimage.ubuntu.com/releases/jammy/release/nvidia-tegra/
Image definition: https://git.launchpad.net/ubuntu-images/tree/ubuntu-server-tegra-igx.yaml?h=jammy
Gadget yaml: https://git.launchpad.net/~canonical-foundations/snap-pc/+git/github-mirror-amd64/tree/gadget-arm64.yaml?h=classic
Building the image:
ubuntu at ubuntu:~/ubuntu-images$ sudo /snap/bin/ubuntu-image classic -w work -O output ubuntu-server-tegra-igx.yaml
WARNING: rootfs.sources-list-deb822 was not set. Please explicitly set the format desired for sources list in your image definition.
WARNING: rootfs.sources-list-deb822 is set to false. The deprecated format will be used to manage sources list. Please if possible adopt the new format.
[0] build_gadget_tree
[1] prepare_gadget_tree
[2] load_gadget_yaml
WARNING: volumes:pc:structure:0:filesystem_label used for defining partition roles; use role instead
[3] verify_artifact_names
[4] germinate
[5] create_chroot
[6] install_packages
[7] prepare_image
[8] preseed_image
[9] clean_rootfs
[10] customize_sources_list
[11] customize_cloud_init
[12] set_default_locale
[13] populate_rootfs_contents
[14] calculate_rootfs_size
[15] populate_bootfs_contents
[16] populate_prepare_partitions
[17] make_disk
[18] update_bootloader
[19] generate_package_manifest
Build successful
Checking the partition table:
ubuntu at ubuntu:~/ubuntu-images$ gdisk -l output/ubuntu-22.04-preinstalled-server-arm64+tegra-igx.img
GPT fdisk (gdisk) version 1.0.8
Caution: invalid backup GPT header, but valid main header; regenerating
backup header from main header.
Warning! Main and backup partition tables differ! Use the 'c' and 'e' options
on the recovery & transformation menu to examine the two tables.
Warning! One or more CRCs don't match. You should repair the disk!
Main header: OK
Backup header: ERROR
Main partition table: OK
Backup partition table: ERROR
Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: damaged
****************************************************************************
Caution: Found protective or hybrid MBR and corrupt GPT. Using GPT, but disk
verification and recovery are STRONGLY recommended.
****************************************************************************
Warning! Secondary partition table overlaps the last partition by
9585020 blocks!
You will need to delete this partition or resize it in another utility.
Disk output/ubuntu-22.04-preinstalled-server-arm64+tegra-igx.img: 9724252 sectors, 4.6 GiB
Sector size (logical): 512 bytes
Disk identifier (GUID): F29EC7AD-406F-4DD2-89BF-94F539E6BFAC
Partition table holds up to 128 entries
Main partition table begins at sector 2 and ends at sector 33
First usable sector is 34, last usable sector is 139231
Partitions will be aligned on 2048-sector boundaries
Total free space is 2014 sectors (1007.0 KiB)
Number Start (sector) End (sector) Size Code Name
1 2048 104447 50.0 MiB EF00 EFI System
2 104448 9724251 4.6 GiB 8300 writable
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