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Why do I see 'found duplicate pv' warnings when using LVM with multipath storage in RHEL?

Updated 2014-03-21T08:49:36+00:00

Issue

  • LVM commands (such as vgs, lvchange, etc) display messages like this:
        Found duplicate PV GDjTZf7Y03GJHjteqOwrye2dcSCjdaUi: using /dev/dm-5 not /dev/sdd
        Found duplicate PV GDjTZf7Y03GJHjteqOwrye2dcSCjdaUi: using /dev/emcpowerb not /dev/sde
        Found duplicate PV GDjTZf7Y03GJHjteqOwrye2dcSCjdaUi: using /dev/sddlmab not /dev/sdf
  • Why do I get duplicate PV warnings when I run LVM commands?
  • How can I get rid of duplicate PV messages display by LVM commands?
  • Why do my physical volumes show as sd devices instead of mpath devices?

Environment

  • Red Hat Enterprise Linux (RHEL) 6
  • Red Hat Enterprise Linux (RHEL) 5
  • Red Hat Enterprise Linux (RHEL) 4
  • lvm2
  • Multiple paths to storage device(s)

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