Hi, We have a few SharePoint databases that are reaching a larger size than our backup/restore window allows (or will be in the near future). We want to split each large database into new smaller sized databases while keeping all sites up and available if possible. We want to do this over a weekend and have little/no downtime. Has anyone done this before? Or does anyone have a step by step guide for doing this?

The following article might help you http://technet.microsoft.com/en-us/library/cc825328(office.12).aspx--Cheers