The VssSourceType enumeration specifies the type of data that a writer manages.
public enum VssSourceType
The source of the data is a database that does not support transactions.
Unclassified source type—data will be in a file group.
This is the default source type.
The source of the data is a database that supports transactions, such as Microsoft SQL Server.
The source of the data is not known.
This indicates a writer error, and the requester should report it.