When manually scanning for new LUNs, running multipath, and starting clvmd immediately after, not all volume groups are found in RHEL 5

Solution In Progress - Updated -

Issue

  • Why were all VGs not detected after a multipath flush and LUN scan?
  • The issue was that at a given time, out of all LUNs visible in the node, only some of them had the Volume Groups initiated/present.

Environment

  • Red Hat Enterprise Linux (RHEL) 5 with the Resilient Storage Add On
  • lvm2-cluster
    • locking_type = 3 in /etc/lvm/lvm.conf
    • One or more volume groups with the clustered attribute set
  • Using a procedure that runs multipath and then quickly starts clvmd afterwards
    • Typically involving an environment with a large number of storage devices

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