Event ID 51

Hi,

Of 10 WS2012R2 backing up to either a NAS or a local USB drive, 6 generate the event ID 51 warning (An error was detected on device \Device\<var>DeviceName</var> during a paging operation) during the backup operation. All 6 servers are domain controllers.

The remaining 4 WS2012R2s do not log this warning, these 4 are not domain controllers.

What does this warning mean? Can we ignore this warning? The backup jobs run otherwise successfully.

Thanks

Ueli