This bug was fixed in the package ubiquity - 20.04.5
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ubiquity (20.04.5) focal; urgency=medium
[ Jean-Baptiste Lallement ]
* zsys-setup: Drives bigger than 2TB use GPT but if the machine has been
booted in legacy mode the ESP is not created. Rely on the label type
** Tags removed: rls-ff-incoming
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https://bugs.launchpad.net/bugs/1856863
Title:
Ubiquity crashes when partitioning the disk with ZFS installation
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I meant bug 1858966
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https://bugs.launchpad.net/bugs/1856863
Title:
Ubiquity crashes when partitioning the disk with ZFS installation
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Setting back to "In progress", there is still one bit of the fix missing
according to 1856863 to make a gpt partition bootable on legacy bios.
** Changed in: ubiquity (Ubuntu Focal)
Status: Triaged => In Progress
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We'll do a release of ubiquity with this fix likely this week or next.
It'll close this bug report automatically and you'll be notified. Then,
next daily of focal will have the fix.
It won't be released to 19.10. There is no point release or daily images
for non-LTS releases.
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Thanks for your fix (it's indeed much cleaner than mine) and I look
forward to test it.
Do you plean to integrate it in any 19.10.x installer release? Is there
any daily build I can test with the fix included?
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I attached a branch that fixes this issue. It's a slightly different
implementation from what you suggested but basically the idea is the same.
I tested it on a system with gpt and msdos disk labels with and without an efi
firmware.
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** Merge proposal linked:
https://code.launchpad.net/~jibel/ubiquity/+git/ubiquity-1/+merge/377179
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https://bugs.launchpad.net/bugs/1856863
Title:
Ubiquity crashes when partitioning
Thank you for the patch. I'll apply it.
Looking at partman-auto it uses gpt instead of msdos disklabel if the
disk is larger than 2TB. It was the case of the original bug report and
the duplicate.
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** Also affects: ubiquity (Ubuntu Focal)
Importance: Medium
Status: Confirmed
** Changed in: ubiquity (Ubuntu Focal)
Importance: Medium => High
** Changed in: ubiquity (Ubuntu Focal)
Status: Confirmed => Triaged
** Changed in: ubiquity (Ubuntu Focal)
Assignee:
The issue stems from the assumption made by the installer that only EFI
systems need to label disks as GPT. I've created a non-UEFI VM with an 8
GB thin-disk and was able to reproduce the issue, but the following diff
was enough to make the installation to succeed:
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** Tags added: zfs
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https://bugs.launchpad.net/bugs/1856863
Title:
Ubiquity crashes when partitioning the disk with ZFS installation
To manage notifications about this bug go to:
Right it's an issue with CSM but I haven't been able to figure out exactly what
and produce a test case. The 4TB limit is a very good point though. I'll do
some more testing based on this hypothesis after EOY break.
Thanks for testing and your help.
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The issue seems to affect only non-UEFI system configurations (after
disabling CSM in the BIOS) I haven't been able to reproduce it, so I
assume it has something to do with trying to install ZFS (GPT??) on
disks >4TB, but I haven't been able to test that hypothesis.
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