Comment 8 for bug 1358491

TJ, I have the same problem on my home system, a HP Z600 with hardware RAID.

Looking at the results from 4 different reboots today:

$ grep "conflicting device node" </var/log/syslog
Mar 7 09:36:22 z600 kernel: [ 14.744525] systemd-udevd[738]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p4' found, link to '/dev/dm-4' will not be created
Mar 7 09:36:22 z600 kernel: [ 14.923887] systemd-udevd[733]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p1' found, link to '/dev/dm-1' will not be created
Mar 7 09:36:22 z600 kernel: [ 14.934934] systemd-udevd[741]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p2' found, link to '/dev/dm-2' will not be created
Mar 7 09:36:22 z600 kernel: [ 15.412385] systemd-udevd[733]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p3' found, link to '/dev/dm-3' will not be created
Mar 7 20:34:03 z600 kernel: [ 14.711869] systemd-udevd[742]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p1' found, link to '/dev/dm-1' will not be created
Mar 7 20:34:03 z600 kernel: [ 14.737949] systemd-udevd[741]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p2' found, link to '/dev/dm-2' will not be created
Mar 7 20:34:03 z600 kernel: [ 14.775406] systemd-udevd[742]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p4' found, link to '/dev/dm-4' will not be created
Mar 7 20:34:03 z600 kernel: [ 14.775510] systemd-udevd[731]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p1' found, link to '/dev/dm-1' will not be created
Mar 7 20:34:03 z600 kernel: [ 15.036880] systemd-udevd[741]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p3' found, link to '/dev/dm-3' will not be created
Mar 7 20:34:03 z600 kernel: [ 15.275910] systemd-udevd[733]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p2' found, link to '/dev/dm-2' will not be created
Mar 7 20:34:03 z600 kernel: [ 15.276606] systemd-udevd[730]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p5' found, link to '/dev/dm-5' will not be created
Mar 7 20:34:03 z600 kernel: [ 15.461964] systemd-udevd[730]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p5' found, link to '/dev/dm-5' will not be created
Mar 7 20:34:03 z600 kernel: [ 15.831112] systemd-udevd[731]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p6' found, link to '/dev/dm-6' will not be created
Mar 7 20:34:03 z600 kernel: [ 15.875357] systemd-udevd[730]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p7' found, link to '/dev/dm-7' will not be created
Mar 7 20:34:03 z600 kernel: [ 15.945102] systemd-udevd[733]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p8' found, link to '/dev/dm-8' will not be created
Mar 7 21:03:39 z600 kernel: [ 18.100972] systemd-udevd[737]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p2' found, link to '/dev/dm-2' will not be created
Mar 7 21:03:39 z600 kernel: [ 18.140472] systemd-udevd[745]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p5' found, link to '/dev/dm-5' will not be created
Mar 7 21:03:39 z600 kernel: [ 18.677290] systemd-udevd[738]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p6' found, link to '/dev/dm-6' will not be created
Mar 7 21:03:39 z600 kernel: [ 18.692634] systemd-udevd[738]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p9' found, link to '/dev/dm-9' will not be created
Mar 7 21:03:39 z600 kernel: [ 18.716691] systemd-udevd[737]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p5' found, link to '/dev/dm-5' will not be created
Mar 7 21:25:44 z600 kernel: [ 15.418372] systemd-udevd[842]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p2' found, link to '/dev/dm-2' will not be created
Mar 7 21:25:44 z600 kernel: [ 15.487121] systemd-udevd[842]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p4' found, link to '/dev/dm-4' will not be created
Mar 7 21:25:44 z600 kernel: [ 15.658368] systemd-udevd[832]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p6' found, link to '/dev/dm-6' will not be created
Mar 7 21:25:44 z600 kernel: [ 15.802411] systemd-udevd[839]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p3' found, link to '/dev/dm-3' will not be created
Mar 7 21:25:44 z600 kernel: [ 15.999608] systemd-udevd[838]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p7' found, link to '/dev/dm-7' will not be created
Mar 7 21:25:44 z600 kernel: [ 16.158226] systemd-udevd[832]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p5' found, link to '/dev/dm-5' will not be created
Mar 7 21:25:44 z600 kernel: [ 16.325655] systemd-udevd[832]: conflicting device node '/dev/mapper/isw_ciijhaceja_Volume0p9' found, link to '/dev/dm-9' will not be created

$ cat /proc/cmdline
BOOT_IMAGE=/vmlinuz-3.13.0-46-generic root=UUID=b457b901-0f29-46b3-b76e-c4981011f83a ro quiet splash
$ cat /proc/version
Linux version 3.13.0-46-generic (buildd@tipua) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #77-Ubuntu SMP Mon Mar 2 18:23:39 UTC 2015

The system does boot, but it's strange that the number of conflicts varies with each boot sequence.

Any help is appreciated.