Unable to generate vmcore on guest running on clustered Hyper-V 2012

Solution Verified - Updated -

Issue

  • Unable to generate vmcore on guest running on clustered Hyper-V 2012.
  • Triggering crash with SysRq hang at message waiting for 1 sda-like device(s)... and then the VM reboots:
    crash1.jpg
  • Triggering crash with SysRq hang at message as below, then the guest reboots:
    crash2.jpg

Environment

  • Red Hat Enterprise Linux 6.x
  • Red Hat Enterprise Linux 7.x
  • Clustered hosts on Hyper-V 2012

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