Hyper-V disks 'last modified' ages ago
I'm just looking into our backups and have noticed something odd - probably because I don't understand something.
Some of our servers (the low IO ones, like the KMS server and the DHCP server) have a last modified date on the vhdx files of sometime back in September. The high IO ones are basically up to date, modification-wise.
This means that our backups of those servers are seriously out of date - a restoration would return the server to its state at that modification date.
To give a little explanation of our setup:
We use 2 Windows 2012 nodes as our Hyper-V boxes, and a third as our storage server. The hyper-v guests are accessed via a 10GbE connection, from SMB3.0 shares.
To backup, we use BackupAssist 7.1, which supports this setup.
So, why are the low IO systems not writing to disk? How can we solve this?