Has anyone had an issue with SQL Server databases supporting Sharepoint 2007 waiting sometimes for hours to start the backup process? Most of the time, the backup takes about only 20 minutes. Occassionally it will hang for six hours waiting to finish. Most of the time, this long time correlates with the log also taking a long time. It also seems to be waiting for something to finish. We don't have anything like this difficulty with a host of other non-Sharepoint SQL Server databases.
If you have had an issue, what did you do about it?