Comment 30 for bug 581566

@bash.vi

The reason that dmraid will halt your system from booting is that the raid metadata will still be in your disks.
To stop dmraid from recognising your disks as a raid you have to purge this data from your disks.

Dmraid can only identify disks as in a raid set by this metadata.

I get these udevd error every-time I boot but it doesn't seem to effect my raid which has been running perfectly on 10.04, haven't tried 10.10 yet. The dm-xx nodes aren't even associated with dmraid so this bug is irrelevant from dmraid anyway.

The installer in 10.04 would leave you with a broken install if you let it do the partitioning, I manually create my partition using gparted then install using ubiquity. I'm not sure if ubiquity is fixed yet or not as I have fallen behind in my Ubuntu testing.