Server unresponsive until reboot.

[Mr_Jiminy]

I experienced an odd issue at a single domain controller site this morning. The DC (2012 R2) was showing as online, users could process logon credentials, however all clients processed the logon without presenting a failed logon attempt to end users.

 

The network was recovered within minutes following a reboot of the DC.

 

Event logs indicate that an error occurred during a write procedure to one of the DAS backup disks, circa 7pm the previous evening, however the backup routine completed without error. Also I find it hard to believe an external disk IO error would cause this fault.

 

I wish now I had prolonged the restart of the server and perhaps focused upon a switch issue... However I would have thought a switch issue would have continued follow the server reboot.

 

Thoughts?

[TheRobins]

Hard Disk issue on your DAS backup?

 

Some backup agents really imbed themselves into windows and when they freeze, so does windows of course.

 

Just be worth seeing if it happens again overnight.

 

To be honest I wouldn't be too concerned, as long as the servers event log looks clear.