Internal disk device is being detected as multipath device

Solution Verified - Updated -

Issue

  • How to blacklist local/internal disks from multipath.

  • The server has two internal drives, mirrored with the HP raid controller and presented to the OS as /dev/sda. Somehow, dm-mpio has created the inbuilt OS drives as multipathed devices. How do I remove the multipathed device for internal disk?

    # multipath -ll
mpatha (3600508b1001c8ce0f7e5aaa1494860fc) dm-0 HP,LOGICAL VOLUME
size=137G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
  `- 2:0:0:1  sda  8:0    active ready running
  • How to convert multipath to single path for local devices in RHEL6.

Environment

  • Red Hat Enterprise Linux 6,7 & 8
    • device-mapper-multipath

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