See proposed workaround from #10. Bug is stale/abandoned. Closing
** Changed in: linux (Ubuntu)
Status: Confirmed => Won't Fix
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https://bugs.launchpad.net/bugs/1358491
Title:
[Trusty] fails to boot with kernels later than v3.11: systemd-
udevd[133]: conflicting device node
Status in linux package in Ubuntu:
Won't Fix
Bug description:
I have a lab server named 'caddy' that is used for data recovery and
forensics of disk drives. It has hot-swap drive bays for various disk
interface types. Amongst others it has a Promise FasTrak TX2000 IDE
'fake' RAID controller.
It was upgraded from Saucy to Trusty. After the upgrade the server
fails to boot using kernel version 3.13.0-24-generic during early udev
whilst still in the initrd. Errors of the form:
[ 6.989549] systemd-udevd[137]: inotify_add_watch(7, /dev/sdi2, 10)
failed: No such file or directory
...
[ 7.092733] systemd-udevd[133]: conflicting device node
'/dev/mapper/pdc_ecjaiecgch1' found, link to '/dev/dm-2' will not be created
are reported for some devices, usually the Promise 'fake' RAID
devices.
The system hangs at that point without ever dropping to a busybox
shell.
Starting with an earlier Saucy kernel version 3.11.0-12-generic allows
the server to start successfully.
After some research it appears that maybe this is due to an
incompatibility between systemd-udevd and device-mapper and/or dmraid-
activate. I read in a similar Fedora bug report a comment by Kay
Seivers:
https://bugzilla.redhat.com/show_bug.cgi?id=867593#c11
"Device-mapper seems to mknod() things in /dev, which just can not work
correctly today.
There is nothing udev can fix here, it will never touch any device
node, which should not exist in the first place, that is in the way."
I've tried breaking initrd, but unless it is done at 'top' udevd
starts and the system hits this problem.
Serial console logs of the failed and successful boot attempts are
attached
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