I can’t get multipath to work, the dm devices can’t be added to file systems but multipath –ll shows them just fine? What could be the issue?

Multipath on the meta data controllers doesn’t envoke until the dev device actually gets added to a file system.  Therefore use the HyperFS GUI to start and restart multipath. A  line in the multipath.conf file checks for valid hyperfs labels. 

Erin Kelly
2019-06-30 16:27