Testing with 20200408.1. It is easier to reproduce this situation on x64
with qemu.
- Create disk images for this test:
$ qemu-img create -f qcow2 sda.qcow2 10G
Formatting 'sda.qcow2', fmt=qcow2 size=10737418240 cluster_size=65536
lazy_refcounts=off refcount_bits=16
$ qemu-img create -f qcow2 sdb.qcow2 4G
Formatting 'sdb.qcow2', fmt=qcow2 size=4294967296 cluster_size=65536
lazy_refcounts=off refcount_bits=16
$ qemu-img create -f qcow2 sdc.qcow2 4G
Formatting 'sdc.qcow2', fmt=qcow2 size=4294967296 cluster_size=65536
lazy_refcounts=off refcount_bits=16
- Put an install ISO in both sdb and sdc. Easiest way is boot qemu from the
installer itself and then copy it:
$ wget http://cdimage.ubuntu.com/ubuntu-server/daily-live/20200408.1
/focal-live-server-amd64.iso
$ qemu-system-x86_64 -enable-kvm -M q35 -m 1G -cpu host -drive
file=sda.qcow2,media=disk,format=qcow2 -drive
file=sdb.qcow2,media=disk,format=qcow2 -drive
file=sdc.qcow2,media=disk,format=qcow2 -drive file=focal-live-server-
amd64.iso,media=cdrom -boot d
- As soon as the installer starts, open the shell and do:
$ sudo dd if=/dev/cdrom of=/dev/sdb
$ sudo dd if=/dev/cdrom of=/dev/sdc
Just to be sure:
$ sudo sync
- Close qemu then start it again, booting from one of the disks as we were
installing from an image dd'ed from an existing install in a server which does
not support virtual media:
$ qemu-system-x86_64 -enable-kvm -M q35 -m 1G -cpu host -drive
file=sda.qcow2,media=disk,format=qcow2 -drive
file=sdb.qcow2,media=disk,format=qcow2 -drive
file=sdc.qcow2,media=disk,format=qcow2 -boot menu=on
- Press Esc and select 2 to boot from sdb.
- Proceed with the installation and select sda as the target.
>> The installer will detect sdc but won't be able to handle this
situation. Crash reports and screenshots attached.
** Attachment added: "Crash report on qemu"
https://bugs.launchpad.net/ubuntu/+source/subiquity/+bug/1871832/+attachment/5350302/+files/1586437687.174328804.install_fail.crash
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https://bugs.launchpad.net/bugs/1871832
Title:
Installer crashed with multiple ISO images on system's disks
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