Public bug reported: This problem seems to be related to a timing bug within `udev`, and has been experienced by other users as seen here; http://serverfault.com/questions/567579/boot-failure-with-root-on-md-raid1-lvm-udev-event-timing
Changing `/dev/md/0` to `/dev/md0` inside `/etc/mdadm/mdadm.conf` seems to resolve the problem. However unless you apply this patch, the system will intermittently fail to boot correctly, getting stuck here; kernel: [ 3.003506] md: bind<sda1> kernel: [ 3.007705] md/raid1:md0: active with 1 out of 1 mirrors kernel: [ 3.007768] md0: detected capacity change from 0 to 499972440064 kernel: [ 3.047284] md0: unknown partition table kernel: [ 3.124709] device-mapper: table: 252:0: linear: dm-linear: Device lookup failed kernel: [ 3.124759] device-mapper: ioctl: error adding target to table kernel: [ 3.125156] device-mapper: table: 252:1: linear: dm-linear: Device lookup failed kernel: [ 3.125196] device-mapper: ioctl: error adding target to table There is also an example `/lib/udev/rules.d/` patch inside the thread I posted above, which proposes to add a `sleep` statement into LVM udev rules. ** Affects: udev (Ubuntu) Importance: Undecided Status: New ** Tags: lvm mdadm raid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1526111 Title: RAID1 + LVM in 14.04.3 causes intermittent boot failure To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/udev/+bug/1526111/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs