How to check which/what multipath configuration is in use for the storage device ?

Solution Verified - Updated -

Issue

  • How to check which/what multipath configuration is in use for the storage device ?
  • Added custom configuration to /etc/multipath.conf file. How to check if multipathd daemon is aware of it ?
  • How to check what path_grouping policy is in use currently for the storage array ?

Environment

  • Red Hat Enterprise Linux 5,6
  • DM-Multipath

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