Oh dear, the answer is so simple after one finally realizes what is going on... The problem here is that the virtio_blk driver has not been changed to support more than 15 partitions per device. The partition scanning is looking at the GPT partition table but only at the first 15 elements. Since the other two partitions are 127 and 128, they never get added if the device is a virtio disk.
So this isn't exactly a bug but a limitation in virtio right now. I am not sure whether the images could use number 14 and 15 for those two partitions. Then they should be visible for emulated and virtual devices... Otherwise this would be some development work which one had to discuss upstream. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1258631 Title: instances fails to register GPT partition entries on virtio devices To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1258631/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
