** Changed in: systemd (Ubuntu)
Status: New => Won't Fix
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https://bugs.launchpad.net/bugs/1526111
Title:
RAID1 + LVM in 14.04.3 causes intermittent boot failure
Status in systemd package in Ubuntu:
Won't Fix
Bug description:
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.
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