/Provider=ProviderNameOrId /Type=ShadowType - Displays all volumes which may be shadow copied using the provider specified ...

%1 %2 [/Provider=ProviderNameOrId] [/Type=ShadowType]     - Displays all volumes which may be shadow copied using the provider      specified by ProviderNameOrId.  If ShadowType is given, then lists only      those volumes that may have a shadow copy of that type.     - The Provider ID can be obtained using the List Providers command.     When entering a Provider ID, it must be in the following format:        {XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}      where the X's are hexadecimal characters.      Example Usage: vssadmin List Volumes                              /Provider={b5946137-7b9f-4925-af80-51abd60b20d5}                             /Type=ClientAccessible     - Valid shadow copy types: