[Trusty] fails to boot with kernels later than v3.11: systemd-udevd[133]: conflicting device node
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Confirmed
|
High
|
Unassigned |
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_
...
[ 7.092733] systemd-udevd[133]: conflicting device node '/dev/mapper/
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:/
"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
Changed in linux (Ubuntu): | |
assignee: | TJ (tj) → nobody |
status: | In Progress → Confirmed |
Due to bug 560246 "Launchpad requires the REFERER header on form submission..." apport-collect cannot send the system diagnostic data.