The upstream Redhat bug is closed as NOTABUG, but the situation was not discussed there properly. There was an assumption made that the partition was part of a software raid array at some point. This was not the case for me (brand new disk when installed, only ever in one layout), however it was an LVM partition, so resizing it slightly fixed the problem.
This bug report also says "Affects Fedora", but it definitely affects Ubuntu too. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1011007 Title: blkid identifies ext4 rootfs as silicon_medley_raid_member, breaks boot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1011007/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs