Hi
We have a cluster running on Windows Server 2012 R2 with Hyper-V feature.
One VM that has Windows 2012 R2 Standard OS installed (generation 2) was corrupted via restart.
VM has 3 virtual disks (VHDX) - first for system (dynamic size), second for SQL_data (fixed size) , third for SQL_logs (fixed size)
Yesterday, I restarted VM and VM didn't come up, I got error
- 'Boot Failed. Windows Boot Manager'
- 'Boot Failed. EFI SCSI Device'
Looked all three VHDX we noticed that the first one (system) was corrupted - partition and MBR are gone inside VHDX.
Second and third one are OK, we can mount them and access all data on it.
It looks like on first VHDX (system with SQL 2014 installed) partition was corrupted, so we can't do repair because it's says unknown partition.
There were no updates applied to VM, corrupted partition is 40GB size (dynamical) with 18GB of data used.
This is first generation 2 VM that we have, all others are generation 1 without any problems.
Can anyone please explain us, how can this happened, since we did nothing inside VM, also cluster reports no errors, checking VHDX looks fine, just partition inside got corrupted.
We like to find out what happened, before we deploy more Win2012 R2 VM (gen2) in production envirionment.
Thank you in advance
Regards
Mike
