[rhelv6-list] LVM over dm-multipath

Tom Sightler ttsig at tuxyturvy.com
Fri Mar 25 15:42:42 UTC 2011


On Fri, 2011-03-25 at 09:52 -0500, Greg_Swift at aotx.uscourts.gov wrote:
> 
> # preferred_names = [ "^/dev/mpath/", "^/dev/mapper/mpath", "^/dev/[hs]d" ]
> 
> -greg

Thanks for the suggestion.  I actually did some digging and saw that the
dm-multipath modules were being loaded very late so I looked in
initramfs and didn't see them there at all.  Looked like dracut was
completely ignoring multipath so I did some more Googling and came up
with:

https://bugzilla.redhat.com/show_bug.cgi?id=518982

Which wasn't exactly the same, but had some similarities.  My issue
wasn't with the root volume, which is just on a local RAID controller so
not multipath, but it appeared that dracut wasn't including the
multipath because the root volume didn't need it.

So I ran "dracut -a multipath --force" to recreate a new initramfs with
the dracut multipath module manually specified and that took care of it.

To fix it "permanently" I dropped a file in /etc/dracut.conf.d with the
following contents:

add_dracutmodules+=" multipath "

Seems like it shouldn't be required, but an easy fix none the less.
Maybe I'll dig into it some more when I have time.

Thanks,
Tom





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