According the the Windows documentation, a backup of the system state can be created by using the command wbadmin start systemstatebackup. In a cluster environment, this can only be performed on the secondary node, not the primary node.
Having a Windows 2008 failover cluster, this presents a conundrum in that I have services installed whose underlying executables are stored on the shareable SANS device. This means that as the secondary node, the system state knows about the location of these files but cannot access these files.
To get a list of services as recorded by the system state, I use the utility MSINFO32.EXE. This is found by type MSINFO32 in the search box:

Using this utility, all the services are listed. I highlight the ones that are installed from the SANS device.

Performing a system state backup on this configuration appears to yield the Enumeration of the files failed error.

It appears that performing a system state backup on this configuration is not possible. The only manner in which I am able to capture the system state is by performing a full windows backup.
Does anyone have any suggestions on how to successfully perform a system state backup with this configuration?