I am planning out the disk configuration for our Exchange 2007 server. It has a SAN back-end. I want to create LUNS for our Storage Groups and Databases. I will have four Storage Groups with one Mailbox Store in each Storage Group. I was going to put all Databases on a single LUN because that is the way our Exchange 2003 server is configured, but with or current server, I have only 1 Storage Group. Should I create a separate LUN for the log files for each Storage Group, or can I put all the logs from all 4 Storage Groups on the same LUN. It seems easier to put them all on the same LUN so I don't have so many different drive letters to deal with. Just wondering what everyone else is doing.