Enabling SCSI Pass-Through on a RHV virtio-scsi direct lun can result in a non-redundant I/O path

Solution In Progress - Updated -

Issue

  • When a RHV direct lun is configured as virtio-scsi with SCSI Pass-Through enabled, even though the lun is backed by multipath, a remote storage failure can result in I/O errors reported by the guest o/s.

  • Multipathing does not take affect, and the I/O error is passed through to the guest.

Environment

  • Red Hat Virtualization (RHV) 4.0, 4.1
  • Red Hat Enterprise Linux (RHEL) hosts 7.3, 7.4, 7.5
  • Direct Lun configured as virtio-scsi with Enable SCSI Pass-Through set (default)

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