Contributed By: Wally Mead [MS]
No, we don't support that. You would need to have a backup/recovery plan to recover your server. It's actually not as bad as it sounds, as clients don't interact with the site server anyway, they interact with management points, client access points, server locator points, and distribution points, all of which have procedures for redundancy.

Contributed By: Cliff Hobbs [MVP SMS]
You might also want to checkout Chapter 15 "Backup and Recovery" of the SMS 2003 Operations Guide:

http://www.microsoft.com/resources/documentation/sms/2003/all/opsguide/en-us/default.mspx
 

To see other SMS 2003 Design and Planning related FAQs click here.