Why do I see different disks headers for Oracle raw devices?

Solution In Progress - Updated -

Issue

  • Why different types of headers CANDIDATE and MEMBER are shown for the raw devices?
GROUP_NUMBER    INST_ID HEADER_STATUS                        NAME            PATH                      OS_MB   TOTAL_MB
------------ ---------- ------------------------------------ --------------- -------------------- ---------- ----------
           0          1 CANDIDATE                                            /dev/raw/raw43            1000          0
           0          1 MEMBER                                               /dev/raw/raw21            2000          0

Environment

  • Red Hat Enterprise Linux (RHEL)
  • Oracle

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