Thanks for sharing the configuration details. Well, I didn't really said that the support is limited to Mod9, 27 and 54, these were just examples, there are more models, like for example Model-108 and Model-108 is a 3390 standard size as well afaik. But tbh. in the last 15 years where I work on s390x technology I didn't got in touch with a single installation where non-standard sizes were used or disks > mod54. Even several IBM documentations just mention and recommend the standard sizes, like 'Practical Migration from x86 to Linux on IBM System z' or 'The Virtualization Cookbook'. For full flexibility in size there is always to option to use zFCP instead of DASD storage.
And it's not surprising that things work differently on 16.04 and 18.04 compared to 20.04, since the installer is brand new - the DASD driver itself of course didn't changed much. One of the positive things about the new installer is that it's shell offers a nearly fully fledged live system, that allows configurations beyond the installer capabilities. On top there is still a 20.04 image with a d-i installer available (nowadays called the legacy image: http://cdimage.ubuntu.com/ubuntu-legacy-server/releases/20.04/release/), but of course we want people to switch over to the new one. Btw. the DASD driver supports even more today pretty uncommon DASD types, like 9345 or 3380, but these aren't tested either. I'm not going to close this ticket and will try to further investigate what happened and maybe even find a way to re-create (if possible in our env.), but will lower the importance to Medium, since two workarounds exist (legacy image and manual intervention via installer shell). ** Changed in: ubuntu-z-systems Importance: High => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1878596 Title: [Ubuntu 20.04] - Install - problem To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1878596/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
