I am running Windows Server 2012 as a guest VM on a Hyper-V server. Every night I get the following warning errors in my event log: "Reset to device \device\RaidPort1 was issued". The source is vhdmp and the event id is 129. It happens multiple times and seems to coincide with a Windows Server backup that runs nightly to an external hard drive. This does not seem to have an impact on the server. Reboots are not necessary and the errors do not occur during normal daily operation. However, I am uncomfortable just ignoring the message. Is this safe to ignore? I have seen other posts where this error requires a hard reboot of the server. In my case, it happens overnight and has not caused problems so far (to my knowledge).