SUMMARY
Steps to resolve an issue where a Hyper-V GEN 1 VM would fail to boot when the boot disk was not Disk 0.
ISSUE
A Hyper-V GEN 1 VM fails to boot when the boot disk is not Disk 0.
RESOLUTION
Upgrade to version 9.1.0 or later of the Unitrends software.
CAUSE
A known bug in a version previous to 9.1.0.