Chris details how to use a hex editor and modify the registry to increase ntbackup performance. He also mentions that you can now use the /FU switch with SP1’s ntbackup, which according to KB 814583 enables a “file unbuffered” setting to bypass the cache manager. This change provides a number of benefits during the disk-to-disk backup process:
- Sustainable throughput over time
- Reduction in processor utilization: on average, peak utilization is reduced to 30 percent
- Elimination of impacts to the system process during the backup job
If for some reason you are running a pre Service Pack 1 version of Windows Server 2003, KB 839272 describes a hotfix version of ntbackup.exe you can download that supports the /FU switch.