Cannot boot when root is in a clustered volume group on Red Hat Enterprise Linux

Solution Verified - Updated 2019-05-09T07:41:00+00:00 -

Issue

If the root volume group has been enabled for cluster locking the system will be unable to boot successfully.

Red Hat Enterprise Linux (RHEL), including:
- Red Hat Enterprise Linux 5 (RHEL5)
- Red Hat Enterprise Linux 6 (RHEL6)
Root device is an LVM volume, or a non-shared volume group is marked clustered but Clustered-LVM (CLVMD) is not in use.
- The volume group has been marked "clustered" and cannot be activated without clvmd running, but clvmd is not used on this server:
```
# lvm vgdisplay
  Skipping clustered volume group vgroot
```

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