[dm-devel] Multipath not rebuilding correctly on reboot
Greene, Rick
rick.greene at ncogroup.com
Thu Jan 31 20:20:04 UTC 2008
Now that I seem to have multipath and my XP 1024 working together, I've
found a new issue. Someone recently had a similar thread going, but I
saw no ultimate resolution.
My problem is that when I reboot my server, the multipath configuration
is not coming back the way it was before. I moved the two external
tools I use to find the UID into /etc (they had bin in /usr/bin and
/sbin), updated the multipath.conf file (and one of the scripts) to
reflect this, but odd things are still happening.
Attached is initial_view.txt, which shows what multipath is coming up
with when I do the commands shown (the bulk of the file is multipath -v3
output, but at the bottom of the file is a multipath -ll output as
well). It (seems to) correctly shows that I have 4 disks, each visible
via two separate paths.
After I reboot, however, I get different results. Once it showed 4
paths for mpath0, and 2 paths for mpath1, 2, and 3. Next time it
correctly showed mpath0, mpath1, and mpath3, but didn't show mpath2 at
all. On the next attempt I got everything correct, and the very next
one only showed mpath0 and mpath1.
The post_reboot.txt file shows the contents of the /var/log/boot.log
file and the output of the dmesg command, along with the "multipath -ll"
view from the most recent reboot.
I then manually did a "multipath -v2" and the missing two paths then
came back. The file manual_run.txt shows those results plus the updated
"multipath -ll".
Do I need to just make my own /etc/init.d script to do a "multipath -v2"
at the end of booting to make sure it all gets covered, along with the
requisite LVM & mount commands to get the VG that is on these disks
working right?
Thanks in advance,
Rick
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