The last time we did a fail-over test in January, everything worked as expected. Today, when doing the same test 5 of my 6 VMs will no longer boot.
2 of them simply display a black screen with a blinking cursor when I view them in Boot Diagnostics, 3 of them display non system disk or disk errors. I've attempted restarting, re-deploying and winding down and re testing from a older RPO (both app and crash consistent ones.) No success and no useful messages to work with.
It's a mix of OS's; 2012R2, and 2016. All replicated from Windows Server Hyper-V 2016.
Again, this worked 3 months ago, no errors in replication health, and other than windows updates, no changes to the servers/applications on them.
Did a recent windows update have a known issue with Azure replication or something - anyone have any ideas?
TL;DR - rinse and repeat. Tried again next week and it worked.
I came back a week later and repeated process and same servers all come up this time... No changes. Presumably an update of some sort as I tried multiple restore points going back 12 hours before I posted my question...