Thank you for taking the time to report this bug and helping to make
Ubuntu better. Reviewing your log files attached to this bug report it
seems that there is a problem with the disk to which you are trying to
install Ubuntu. I'd recommend performing a back up of your existing
operating system a
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https://bugs.launchpad.net/bugs/894778
Title:
cannot upgrade to 11 from 10.4
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https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/89477