HP StorageWorks Application Recovery Manager Administrator's Guide (T4395-96004, February 2008)

Configuration
Chapter 220
Server may require additional configuration steps. For details, see the
appropriate sections. You must also configure the VSS and VDS
hardware providers.
You may check which writers and providers are installed and registered
on your system using the following Windows operating system command:
• For a list of writers: VSSadmin list writers
• For a list of VSS providers: VSSadmin list providers
• VDS hardware providers should be present in the list of installed
software. Check Control Panel -> Add/Remove Programs.
Only non-system writers are supported, because instant recovery cannot
be performed on a system disk.