Are you like me and hate setting permissions with outside scripts on dm-multipath devices? Best way to avoid this mess (and udev rules to boot) is to include the following on your multipath.conf device:
multipath {
wwid 360a98000486e58526c34515944703277
alias devicename
mode 660
uid 501
gid 502
}
What's great about this is when DM-multipath instantiates the new mapper devices, they will all be set with the permissions, user, and group assignments that you want. No muss, no fuss!
Enjoy!
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