Unable to generate vmcore on guest running on clustered Hyper-V 2012
Issue
- Unable to generate
vmcoreon guest running onclustered Hyper-V 2012. - Triggering crash with
SysRqhang at message waiting for 1 sda-like device(s)... and then the VM reboots:

- Triggering crash with
SysRqhang at message as below, then the guest reboots:
Environment
- Red Hat Enterprise Linux 6.x
- Red Hat Enterprise Linux 7.x
- Clustered hosts on Hyper-V 2012
Subscriber exclusive content
A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.
Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.
