Comment 8 for bug 569900

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Serge van Ginderachter (svg) wrote : Re: mount: mounting /dev/md0 on /root/ failed: Invalid argument

I just downloaded ubuntu-10.04-rc-server-amd64.iso and used it on a simple desktop machine where I added a second disk, both on SATA. First disk is around 500GB, second only 160GB.
Running the installer, manually partitioning, I made a partition of around 160GB on both disks, and left the other part of the 500GB one unused. Both 160GB partitions weren't exactly as big which left a small piece 'unused' as reported by the installer.
Further on I installed leaving most options default. One MD raid device on both 160GB partitions, formatting md0 as ext4 and putting / on it.

Reboot, no problem.