MSCS Clustering

Here is some information on creating a Microsoft Cluster. If you upgrade from 3.02 to 3.5 clustering is not supported. If you would like to create a Microsoft Cluster you will need to upgrade to ESX Server 3.5 update 1. Listed below is the information from Vmware websites.

Here's a guide - http://www.vmware.com/pdf/vi3_35/esx_3/vi3_35_25_u1_mscs.pdf and the main documentation page for 3.5 - http://www.vmware.com/support/pubs/vi_pages/vi_pubs_35.html.