SnapDrive doesn't maintain a text file or database containing the information you want. Rather, if connects to the storage one demand and generates this data as needed comparing the current Windows LUN mounts to the current locations of the LUNs on storage. Given you can move a LUN transparently at current levels of Data OnTap, the disk information needs to be dynamic.
You can list the current disk mapping and underlying detail easily to a text file using the SnapDrive CLI.
> sdcli disk list
for example and you could periodically run that and save it off to a text file for reference. You may have to preface the command with path information depending on your Windows PATH variable setting:
> "C:\Program Files\NetApp\SnapDrive\sdcli" disk list
assuming all default locations. The SnapDrive command line is highly useful for automating common operations.
I hope this helps you.
Lead Storage Engineer | Consilio, LLC
NCIE SAN Clustered, Data Protection
Kudos and accepted solutions are always appreciated.