Introduction to NetBackup for SQL Server Technical overview
attempts to retrieve the backup images by specifying the client name with all upper case characters or all lower case characters. If the UNIX client name has mixed uppercase and lowercase characters, you must provide the client name in the Source Client field.
The NetBackup client name is a qualified domain name. To retrieve backup images specify the SQL Host as the NetBIOS name and the Source Client as the fully qualified domain name.
The NetBackup client name is an IP address. To retrieve backup images specify the SQL Host as the NetBIOS name and the Source Client as the IP address:
Retrieving backups that were backed up from a SQL Server cluster. This scenario does not present any special problem because the images are stored under the cluster name. Provide the SQL Host name as the virtual name and use the default value for the Source Client.