Try the Windows Management Instrumentation Command-line (WMIC). Open a command prompt and type wmic diskdrive list and you get info like the following:
Model SAMSUNG SP0802N
and so on.
Mitch Tulloch is lead author for the Windows Vista Resource Kit from Microsoft Press, which is THE book for IT pros who want to deploy, maintain and support Windows Vista in mid- and large-sized network environments. Mitch is also the author of Introducing Windows Server 2008, the first book from Microsoft Press about the exciting new server platform. For more information on these and other books written by Mitch, see www.mtit.com.