Comment 4 for bug 88444

Thanks for your report. It appears that the kernel encountered too many errors when trying to write to your hard disk and gave up in order to avoid causing further damage. This is often due to a faulty hard disk, and at any rate isn't an installer bug as such. It may help to check whether the hard disk is old and in need of replacement, or to move the system to a cooler environment.

In any case, ubiquity's poor response to this event is bug 69470.