When you map a network drive to a local share, your System event log receives:
Event ID: 3019 Source: MRxSmb Description: The redirector failed to determine the connection type.This error is known to occur with TCP/IP over a Loopback adapter. The Loopback adapter does not handle speed negotiation.
You can safetly ignore this event.
The event occurs:
1. On the first access after you log on.
2. On the first access after resuming from hibernation mode.
3. On the first access after an autodisconnect. Turn off autodisconnect.