We are running SQL Server 2012 with the latest updates installed. We have an 80GB database that we are backing up. Using compression, the resulting database is about 20GB. This backup is taking almost 4 hours to run, which seems way too long for that amount of data.
Also, during the time the backup is running, the server is very unresponsive. We can not even connect to the server with Remote Desktop as it times out after several minutes.
Any suggestions for why a backup could be running so slowly?