RHV: Hotplug disk fails

Solution Verified - Updated -

Issue

  • Disk hotplug randomly fails with:
 __com.redhat_drive_add': Device 'drive-virtio-diskX' could not be initialized
  • Cannot attach disks to VMs
  • Cannot use the Backup API to backup VMs
  • Commvault Backup Fails repeatedly

Environment

  • Red Hat Virtualization 4.1
  • Red Hat Enterprise Linux 7.4
    • libvirt-3.2.0-14.el7_4.3.x86_64

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