Published 31 January 2017
This wait is very common if you’re dealing with a tape backup system. However, if you’re backing up to a networked resource of any kind, you may also see this wait. It could be that:
your network is suffering from latency. Latency can occur if the network resource you’re backing up is in a physically distant location, with the distance travelled causing the problem.
high load exists on your network.
there’s some sort of slow down on the networked storage to which you’re running your backup.
Investigate your tape system
If you are running a tape backup system and are experiencing excessive wait times of this type, ensure that it is configured correctly and has the latest service packs installed.
Investigate your network
Use ping to determine general latency between systems.
Check for network configuration issues which may lead to high latency between systems.
Make sure your network interface cards (NICs) are configured correctly.
You may need to add additional NICs and split your backup into multiple files through the new NICs.
Consider separating your access and backup network physically through different switches.
Investigate network storage
Check that the networked storage is configured correctly.
See if the network storage is itself under load, causing waits on writes for your backup.
Test the network for general latency due to load or distance. See sys.dm_io_virtual_file_stats (MSDN).