[CentOS] stale dm-multipath mappings

Eugene Vilensky

evilensky at gmail.com
Thu May 7 21:38:15 UTC 2009


>
> Just wondering what sort of impact this has to your system? If the
> paths are gone they won't be used, so what does it matter?
>



Right now I have backgrounded a 'vgscan -v' operation that froze, which has
never happened before. I assume it is trying to scan the /dev/mpath23 device
that is supported by these four downed paths, and I am worried what would
happen if I removed the maps manually while in this state.

I am surprised there is not an error-return of some kind between vgscan and
dm-multipath if all paths for a particular mpath device are down...
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