Configure the TCP send and TCP Receive Buffer Sizes
Set the value for the TCP Send and TCP Receive buffer sizes to 65536.
Eliminate Backup Failures
To speed up the backup process and to avoid backup failures, you can filter out items which consistently fail ,for example locked system objects, system libraries, and operating system objects. For information on how to set filters for backups, see Defining Filters.
After you add the failed objects to the filter, run a full backup to remove them from backups.