I am going to be installing SP 2013 Standard in a farm config. We'll have four servers: 2 WFE/App servers, 1 SQL Server, and one app server dedicated to Search. On the SQL server, I plan on 2-3 partitions, 1 for the OS and 1-2 for the logs and databases. I am not sure about the WFE/app server or the search server, though. Any guidance is appreciated.